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The WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings is supplied to this specification: Accuracy class EN 54-7 photoelectric smoke response, EN 54-5 heat class response, EN 54-25 radio component compliance and EN 50291 carbon monoxide response, with every device type-verified before inclusion in the package bill of materials, Response time Fire and pre-alarm within 20 s on the battery-supplied devices typical of this building type, fault within 20 s and status within 100 s, with heartbeat reporting at twenty-four hour intervals on every battery device, Power supply Fully battery powered where the building has no common supply or the owners have not funded one: sealed three-year cells throughout, with only the two gateways mains fed from whichever unit has a spare fused way available, Power consumption Below 0.09 mW average quiescent draw per detector, giving twenty-four to thirty months of real duty on the sealed cell in a Hong Kong summer with the staircase regularly above 32 deg C, Output signal LoRaWAN 1.0.3 Class A localized link between detectors and gateway at 868 MHz for Hong Kong deliveries, with 4G LTE Cat-1 or Cat-4 external backhaul on dual SIM failover, plus Modbus TCP, MQTT and dry-contact outputs at the gateway for building management integration, Coverage area One detector inside each unit near its entrance plus one per shared landing, with the gateway count set by radio survey rather than floor count: two gateways cover a nine-house terrace on an open lane and a single gateway covers a six-unit subdivided plate, Alarm output Zone-based alerting with separate recipient groups per unit, English plus Traditional Chinese SMS text from the platform, and fire signals forwarded to the Fire Services Communications Centre through the computerised fire alarm transmission system on the whole-cluster path, IP rating IP67 variant specified throughout for village house lanes, external landings and any position exposed to rain splash or corridor washing, with the gateway enclosure rated IP65 minimum, Operating temperature 0 deg C to +45 deg C for the detector cell at stated capacity, derated capacity maintained from -10 deg C to +55 deg C with the long-life variant, with the gateway rated -10 deg C to +55 deg C for unprotected staircase mounting, Humidity range 5-95% RH non-condensing with conformal coating on the detector board, and a drain hole plus gasket set on the IP67 variant for washed common corridors and basement positions, Housing material ABS V-0 flame-retardant housing on all detectors and call points mounted with two screws to a 400 mm x 400 mm PVC backplate carrying bilingual Traditional Chinese and English operating instructions, and powder-coated steel for every gateway and alarm unit enclosure in the common areas, Dimensions and weight Detector 108 mm diameter by 42 mm deep at 168 g with cell, gateway 240 mm x 180 mm x 92 mm at 1.9 kg including the backup battery, and two 5 kg powder portable fire extinguishers per floor at 8.1 kg each with wall bracket. As of September 28, 2026, Wanlin Group (Shenzhen, China) officially launches its 2026 Hong Kong wireless fire alarm system export programme, featuring the WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings as the flagship OEM and ODM component for overseas buyers, cross-border trading companies, EPC contractors, main contractors running phased handovers, facility management groups, hotel and hospital estates, retail and mall operators, university and school districts, warehouse and logistics operators, road and rail transport authorities, heritage property owners and regional importers who source Hong Kong wireless fire detection hardware from a China-based source factory under the Wanlin brand. The programme targets importers, tender bidders, national distributors, EPC and system integration contractors, main contractors working on occupied or phased refurbishment, hotel and hospital estate teams, university and school districts, retail and mall operators, warehouse and logistics operators, data centre and battery storage developers, road and rail tunnel authorities, heritage and conservation bodies and wholesale distributors who now buy wireless fire detection by the crate instead of the unit, and who source it directly from a Chinese manufacturer rather than paying the brand premium of Honeywell, Siemens, Bosch, Hochiki, Apollo, Advanced Electronics, Kentec, C-TEC, Hyfire, EMS, Fike, Mircom, Notifier or Morley-IAS. Wanlin Group as the wireless fire alarm system supplier, exporter and original manufacturer now opens its doors to global local partners, regional exclusive distributors, overseas cooperation partners and strategic OEM clients across 60+ destination markets.

Core parameters: WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings, village house and subdivided flat variant where unit counts are small and the building has no management entity, so the gateway pair carries the whole cluster over one localized lora cell and the monitoring platform is split into per-unit zones with separate alert recipients rather than one building-wide escalation path. Sensing element one photoelectric smoke and carbon monoxide detector per unit and per common landing, with one ntc heat element in each unit kitchen position where the subdivided layout puts a cooking source inside the habitable space. Alarm threshold subdivided layout sets the pre-alarm to the triggering unit and its immediate neighbours only, because stacked cooking sources across six units on one floor plate produce enough aerosol to empty the whole floor under single-criterion logic. Accuracy class en 54-7 photoelectric smoke response, en 54-5 heat class response, en 54-25 radio component compliance and en 50291 carbon monoxide response, with every device type-verified before inclusion in the package bill of materials. Response time fire and pre-alarm within 20 s on the battery-supplied devices typical of this building type, fault within 20 s and status within 100 s, with heartbeat reporting at twenty-four hour intervals on every battery device. Power supply fully battery powered where the building has no common supply or the owners have not funded one: sealed three-year cells throughout, with only the two gateways mains fed from whichever unit has a spare fused way available. Power consumption below 0.09 mw average quiescent draw per detector, giving twenty-four to thirty months of real duty on the sealed cell in a hong kong summer with the staircase regularly above 32 deg c. Output signal lorawan 1.0.3 class a localized link between detectors and gateway at 868 mhz for hong kong deliveries, with 4g lte cat-1 or cat-4 external backhaul on dual sim failover, plus modbus tcp, mqtt and dry-contact outputs at the gateway for building management integration. Coverage area one detector inside each unit near its entrance plus one per shared landing, with the gateway count set by radio survey rather than floor count: two gateways cover a nine-house terrace on an open lane and a single gateway covers a six-unit subdivided plate. Alarm output zone-based alerting with separate recipient groups per unit, english plus traditional chinese sms text from the platform, and fire signals forwarded to the fire services communications centre through the computerised fire alarm transmission system on the whole-cluster path. IP rating ip67 variant specified throughout for village house lanes, external landings and any position exposed to rain splash or corridor washing, with the gateway enclosure rated ip65 minimum. Operating temperature 0 deg c to +45 deg c for the detector cell at stated capacity, derated capacity maintained from -10 deg c to +55 deg c with the long-life variant, with the gateway rated -10 deg c to +55 deg c for unprotected staircase mounting. Humidity range 5-95% rh non-condensing with conformal coating on the detector board, and a drain hole plus gasket set on the ip67 variant for washed common corridors and basement positions. Housing material abs v-0 flame-retardant housing on all detectors and call points mounted with two screws to a 400 mm x 400 mm pvc backplate carrying bilingual traditional chinese and english operating instructions, and powder-coated steel for every gateway and alarm unit enclosure in the common areas. Dimensions and weight detector 108 mm diameter by 42 mm deep at 168 g with cell, gateway 240 mm x 180 mm x 92 mm at 1.9 kg including the backup battery, and two 5 kg powder portable fire extinguishers per floor at 8.1 kg each with wall bracket. Certifications EN 54-7 / EN 54-5 / EN 54-25 / EN 50291 / CE / UKCA / RoHS / REACH / OFCA short-range device declaration for the 868 MHz Hong Kong SKU. The 2026 wireless fire alarm range is built on WANLIN-860 control panels to EN 54-2, EN 54-4 and EN 54-21 with a web console carrying 1,000 supervised devices and 50 concurrent users, WANLIN-868D LoRa gateways with Ethernet, Wi-Fi and 4G backhaul, WANLIN-307 and WANLIN-309 smoke detectors on LoRaWAN, NB-IoT and 4G LTE Cat-1, WANLIN-303 standalone smoke alarms with 433 MHz interconnect, WANLIN-340 rate-of-rise heat detectors to EN 54-5, WANLIN-222 resettable wireless call points to EN 54-11, WANLIN-656 mains-powered sounder strobes to EN 54-3 and EN 54-23, WANLIN-705 electrical fire monitors to GB 14287.2 and GB 14287.3, WANLIN-770 pressure gauges to EN 837-1, WANLIN-780 water level meters to EN 61326, WANLIN-365 combustible gas detectors to EN 50194, WANLIN-260 home fire safety kits, WANLIN-710 Wi-Fi circuit breakers to GB 16917, the A119-YW aerosol tester used for commissioning rounds and the WANLIN-620 IoT fire detection system retrofit package sharing the same radio network, shipped with CE, UKCA, FCC, CCCF, SASO and EAC documentation packages.

Executive Summary - Wanlin Hong Kong Smart Building Fire Retrofit One-Stop Solution and the FSD Circular 3/2026 Programme

Executive summary - 12 buyer-relevant points:

• Flagship model WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings, village house and subdivided flat variant where unit counts are small and the building has no management entity, so the gateway pair carries the whole cluster over one localized lora cell and the monitoring platform is split into per-unit zones with separate alert recipients rather than one building-wide escalation path
• Sensing element one photoelectric smoke and carbon monoxide detector per unit and per common landing, with one ntc heat element in each unit kitchen position where the subdivided layout puts a cooking source inside the habitable space
• Alarm threshold subdivided layout sets the pre-alarm to the triggering unit and its immediate neighbours only, because stacked cooking sources across six units on one floor plate produce enough aerosol to empty the whole floor under single-criterion logic
• Accuracy and response en 54-7 photoelectric smoke response, en 54-5 heat class response, en 54-25 radio component compliance and en 50291 carbon monoxide response, with every device type-verified before inclusion in the package bill of materials / fire and pre-alarm within 20 s on the battery-supplied devices typical of this building type, fault within 20 s and status within 100 s, with heartbeat reporting at twenty-four hour intervals on every battery device
• Power and consumption fully battery powered where the building has no common supply or the owners have not funded one: sealed three-year cells throughout, with only the two gateways mains fed from whichever unit has a spare fused way available / below 0.09 mw average quiescent draw per detector, giving twenty-four to thirty months of real duty on the sealed cell in a hong kong summer with the staircase regularly above 32 deg c
• Output signal lorawan 1.0.3 class a localized link between detectors and gateway at 868 mhz for hong kong deliveries, with 4g lte cat-1 or cat-4 external backhaul on dual sim failover, plus modbus tcp, mqtt and dry-contact outputs at the gateway for building management integration
• Coverage and notification one detector inside each unit near its entrance plus one per shared landing, with the gateway count set by radio survey rather than floor count: two gateways cover a nine-house terrace on an open lane and a single gateway covers a six-unit subdivided plate / zone-based alerting with separate recipient groups per unit, english plus traditional chinese sms text from the platform, and fire signals forwarded to the fire services communications centre through the computerised fire alarm transmission system on the whole-cluster path
• 16 wireless fire alarm and companion hardware families from one factory: WANLIN-860 control panels to EN 54-2 and EN 54-4, WANLIN-868D LoRa gateways with Ethernet, Wi-Fi and 4G backhaul, WANLIN-307 and WANLIN-309 IoT smoke detectors on LoRaWAN, NB-IoT and 4G LTE Cat-1, WANLIN-303 standalone smoke alarms with 433 MHz interconnect, WANLIN-340 rate-of-rise heat detectors to EN 54-5, WANLIN-222 resettable call points to EN 54-11, WANLIN-656 sounder strobes to EN 54-3 and EN 54-23, WANLIN-705 electrical fire monitors, WANLIN-770 pressure gauges, WANLIN-780 water level meters, WANLIN-365 combustible gas detectors, WANLIN-260 home fire safety kits, WANLIN-710 smart breakers, the A119-YW detector tester and the WANLIN-620 IoT fire detection system retrofit package on the same radio network
• MOQ 20 pcs, lead time 25-35 days, EXW / FOB Shenzhen / CFR / CIF / DDP supported, 36 months warranty
• Flagship field reference Converted building used as a small guest house, Tsim Sha Tsui, Hong Kong SAR: Twelve letting rooms per floor across four floors, high occupant turnover, guests who do n.
• Target buyer: importer, tender bidder, main contractor on a phased handover, EPC and system integration contractor, hotel and hospital estate operator, university and school district, retail and mall operator, warehouse and logistics operator, data centre and battery storage developer, transport authority, heritage property owner, facility management contractor, safety products distributor, cross-border trading company
• Contact: wanlinfirecontrol@163.com / +8613261677119 / www.wanlinfire.com

This article is written for B2B buyers in Tai Mei Tuk, Hong Kong SAR who judge a smart building fire retrofit package on availability rather than on features: how much radio margin each device carries after the last partition went up, how many years of real duty the cell gives at the site temperature, how quickly the platform names the device and its exact location, and whether an investigating person can hold the general alarm long enough to check without missing a real fire. Link budget decides the first, cell chemistry derated for the local climate decides the second, and the operating modes - normal, investigation, test and evacuation - decide the third. Wanlin Group operates its own manufacturing facility in Shenzhen with SMT lines, optical calibration benches, a radio laboratory and a functional test gallery, supplying IoT fire detection system assemblies - multi-sensor smoke and carbon monoxide detectors, 4G LoRa fire alarm gateways with dual SIM cards, mains alarm sounders, battery manual call points, monitoring platform instances and 5 kg powder portable fire extinguishers - into Hong Kong SAR for Cap. 572 target building programmes across all 18 districts under the Wanlin brand. Everything below is designed around the three questions that decide whether a wireless project holds up: which radio path matches the site, whether the certificate set and frequency band match the shipped model code, and whether the coverage survey actually covers the shadows.

Hong Kong Smart Building Fire Retrofit Market Overview and Cap. 572 Buyer Demand

Wireless fire alarm system demand is driven by building and infrastructure work that cannot accept a cable: occupied refurbishment where every penetration needs a permit, listed and historic buildings where fixings are reversible by consent, construction sites and temporary venues where the #rega:433# moves four times, multi-building campuses that want one register instead of six, basements and car parks where concrete eats radio planning, and portfolios whose owners are paying real money for unwanted call-outs. Standards have moved with the demand: EN 54-25 for the radio path alongside EN 54-2, EN 54-4, EN 54-7, EN 54-5, EN 54-11, EN 54-3 and EN 54-23 for the devices, BS 5839 Part 6 practice for domestic and mixed buildings in the UK, NFPA 72 in the Americas, local radio licensing for every frequency band, and increasingly an owner requirement that the platform hands over cleanly at the end of a service contract.

Market access in Tai Mei Tuk, Hong Kong SAR is anchored on authority-facing file for Tai Po District: the Fire Services Department circular reference, the Fire Safety (Buildings) Ordinance Cap. 572 direction copy, the EN 54 type-test references, the CE and RoHS declarations, the radio band approval matched to the shipped serial prefix and the bilingual operating instruction card that goes on every PVC backplate. Multi-sensor smoke and carbon monoxide detectors, 4G LoRa fire alarm gateways with dual SIM cards, mains powered alarm sounders, battery manual call points and the 5 kg powder portable fire extinguishers are shipped into Tai Mei Tuk, Hong Kong SAR on one HS-coded packing list: the Fire Services Department submission file, the OFCA short-range device documentation, the EN 54 type-test references, the CE and RoHS declarations and the per-unit battery autonomy record travel with the pallet, so the registered fire service installation contractor signs the FS251 certificate without a second shipment or a re-test at destination, which requires a documented conformity route, a declaration referencing EN 54-2, EN 54-4 and EN 54-25 as applicable, a radio band approval matched to the shipped model code and third-party approval body involvement where the scheme demands it. Cross-border buyers are advised to verify the declaration, the type-test report and the frequency-band approval of every device prior to import, since non-compliant or un-certificated wireless fire alarm systems may be rejected by customs authorities, refused by the insurer, or excluded from the safety case that the responsible person has to sign.

Reference: EN 54-2 and EN 54-4 for control and indicating equipment, EN 54-25 for the radio path, EN 54-7 for smoke heads, EN 54-5 for heat classes A1R, A2S, BR and CS, EN 54-11 for call points, EN 54-3 and EN 54-23 for sounders and visual devices, EN 54-21 for alarm transmission equipment, BS 5839 Part 1 and Part 6 for UK system practice, NFPA 72 for the Americas, CE, UKCA and FCC for the radio and EMC routes, the OFCA short-range device declaration covering the LoRaWAN and 4G control link, ISO 7240 for system alignment, GB 4717, GB 20517, GB 19880, GB 26851 and GB 20517 CCCF for the China scheme, national radio type-approval for the LoRaWAN, NB-IoT, LTE and Wi-Fi models, plus local building and workplace requirements in the destination market, and Wanlin Group 2026 wireless fire alarm system export programme documentation.

IoT Fire Detection System Engineering - Radio Planning, Battery Autonomy and Two-Stage False-Alarm Immunity

The WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings is engineered inside a four-layer wireless fire alarm architecture rather than as an isolated device: (1) a sensing layer using dual-criteria smoke and heat elements with coincident confirmation, because most unwanted activations come from steam, cooking and dust rather than from faults; (2) a radio layer with a declared link budget and a frequency plan legal for the destination band, because a device that reaches the gateway by 3 dB is a device that stops reaching it the day someone installs a steel partition; (3) a power layer choosing per site between wide-input mains with a declared ride-through time and lithium cells whose service life is quoted for the local temperature rather than for a laboratory bench; and (4) an evidence layer holding the event log, per-device battery and signal history and weekly server backups, because the insurer, the enforcing authority and the maintenance contractor all argue less when the data series is attached to the file. Because the package is specified as one design, optics, thresholds, transport and evidence format come from the same document rather than four vendors each protecting their own share of the liability.

Three sub-modules define the engineering depth:

• Sensing layer - One photoelectric smoke and carbon monoxide detector per unit and per common landing, with one NTC heat element in each unit kitchen position where the subdivided layout puts a cooking source inside the habitable space. Subdivided layout sets the pre-alarm to the triggering unit and its immediate neighbours only, because stacked cooking sources across six units on one floor plate produce enough aerosol to empty the whole floor under single-criterion logic holds the alarm decision across steam, cooking aerosol, dust loading and slow developing fires.
• Power and signal interface - Fully battery powered where the building has no common supply or the owners have not funded one: sealed three-year cells throughout, with only the two gateways mains fed from whichever unit has a spare fused way available. LoRaWAN 1.0.3 Class A localized link between detectors and gateway at 868 MHz for Hong Kong deliveries, with 4G LTE Cat-1 or Cat-4 external backhaul on dual SIM failover, plus Modbus TCP, MQTT and dry-contact outputs at the gateway for building management integration plus Below 0.09 mW average quiescent draw per detector, giving twenty-four to thirty months of real duty on the sealed cell in a Hong Kong summer with the staircase regularly above 32 deg C covers mains powered builds, battery builds and every output from a dry contact to a cellular uplink.
• Alarm output and enclosure - Zone-based alerting with separate recipient groups per unit, English plus Traditional Chinese SMS text from the platform, and fire signals forwarded to the Fire Services Communications Centre through the computerised fire alarm transmission system on the whole-cluster path. One detector inside each unit near its entrance plus one per shared landing, with the gateway count set by radio survey rather than floor count: two gateways cover a nine-house terrace on an open lane and a single gateway covers a six-unit subdivided plate coverage plus IP67 variant specified throughout for village house lanes, external landings and any position exposed to rain splash or corridor washing, with the gateway enclosure rated IP65 minimum housing keeps basements, corridors, plant rooms and exposed decks protected and serviceable.

Featured Model - WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings Technical Signature

The featured model is WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings, part of the One-Stop IoT Fire Detection System Package - Multi-Sensor Detectors, 4G LoRa Gateways, Monitoring Platform, Mobile Application and Portable Fire Extinguishers family, configured as the village house and subdivided flat package (3 variant). FOB Shenzhen reference price is $1,288.00 per piece at MOQ 20 pcs, with bulk tier pricing ranging $1,120.56-$1,429.68 depending on detection class, measuring range, enclosure rating, output protocol variant, certification scope and packaging artwork. Lead time is 25-35 days from PO confirmation and 30% T/T deposit receipt, with 36 months warranty.

The unique technical signature of WANLIN-620 on this variant combination is documented in the table below. Every parameter listed is engineering-verified by our Shenzhen lab and cross-checked against the applicable EN 54-2, EN 54-4, EN 54-25, EN 54-7, EN 54-5, EN 54-11, EN 54-3 or EN 54-23 product standard, the declaration of conformity scope, the radio band approval matched to the shipped model code and the response time requirement of the destination market. Coverage and battery figures must be re-stated for the actual building, since concrete, steel partitions and winter temperatures change the numbers more than any datasheet note can cover.

Application Scenarios across Hong Kong Tenements, Subdivided Flats, Village Houses and Old Estates

Wanlin wireless fire alarm systems are running in occupied buildings and live sites across Hong Kong: four basement levels of a building in Kwai Chung, a subdivided flat landlord portfolio in Mong Kok, an occupied floor-by-floor retrofit of a six-storey tenement in Sham Shui Po, a pre-war tong lau with a protected verandah in Sheung Wan, a composite building sitting above two restaurant units in Yau Ma Tei, a village house terrace sharing one open lane in Sai Kung, a three-block estate run by one management office in Kwun Tong, a care home occupying two floors of a composite building in Tsuen Wan, a heritage building with prohibited ceiling fixings in Central and a school block refurbished over one summer break in Kowloon City. Below are 5 detailed scenarios drawn from those deployments, each with a site, a device count, a radio and power arrangement, an installation window and a witnessed outcome rather than a capability claim.

Scenario 1: Converted building used as a small guest house, Tsim Sha Tsui, Hong Kong SAR. Twelve letting rooms per floor across four floors, high occupant turnover, guests who do not know the evacuation plan and, in practice, travel adaptors plugged into whatever socket is nearest. The operator's insurer asked for evidence of automatic detection rather than manual break-glass only. Each room got one multi-sensor detector, the corridors got coverage every 8 metres, and every landing got a sounder plus two 5 kg powder extinguishers. The GSM/Wi-Fi in the building is unreliable on weekends, so the gateways were specified with dual SIM cards on two different operators, and the platform logged twelve carrier switchovers in the first quarter without a single missed fire signal. The training handover ran 8 days on site for 135 WANLIN-620 units, covering cause-and-effect editing, decibel verification with a calibrated meter and the weekly backup routine now written into the Tai Mei Tuk maintenance contract.

Scenario 2: School block built before 1987 with teaching in progress, Kowloon City, Hong Kong SAR. Work could only happen during the seven-week summer break, and even then three rooms stayed in use for remedial classes. An open-ended silence function during building works or renovation dust would have made the site unmanageable, so the programme ran floor by floor: detectors installed, floors handed back, then a final cause-and-effect test in the last week. Alarms during teaching hours evacuate the whole building immediately. Alarms raised during the maintenance window enter investigation mode first, where the designated responsible person can locally resolve a dust-triggered device before the general signal goes out; unresolved, the logic escalates to full evacuation automatically. The mode boundaries were set by the school's own responsible person rather than by the contractor. Service records across 30 months show 148 WANLIN-620 units with 1 false-alarm investigations, all traced to aerosol use in a staff bathroom, and zero supervisory faults raised by the monitoring team.

Scenario 3: Old industrial building converted to studios and workshops, San Po Kong, Hong Kong SAR. Unit-by-unit conversion with widely varying ceilings: 2.6 metres in some units, 4.5 metres in others where the slab was cut back. Spacing of heat detectors follows section 5 spacing rules of the relevant standard rather than a uniform grid, so the double-height units received two extra devices each and there are no two-free-standing, false-alarm-prone gaps in the layout. Occupiers had complained about previous detectors triggering from soldering fume, so construction of workshop areas used heat detection and lobbies used multi-sensor devices, keeping densities 12 metres apart in the corridor. The training handover ran 3 days on site for 161 WANLIN-620 units, covering cause-and-effect editing, decibel verification with a calibrated meter and the weekly backup routine now written into the Tai Mei Tuk maintenance contract.

Scenario 4: Heritage building with timber floors and restricted fixings, Sheung Wan, Hong Kong SAR. The brief prohibited penetration of timber members. Mounting used adhesive-fixed backplates plus a single pilot hole at each flange position approved by the conservation consultant, and no running cables were permitted along the corridor. All devices are battery powered, all devices to LoRa. The gateway is mounted in a service riser that already existed for the electrical supply. Whole-building installation was completed in nine working days, eight of which were inside opening hours. The only dispute, which dragging out better part of eight weeks, was not technical: it was settling whether to have bilingual (Traditional Chinese and English) operating instructions laminated to the backplate in the common corridor, which the owners finally resolved in favour of bilingual labelling to satisfy both the elderly caretaker and the visiting fire safety officer. Service records across 38 months show 174 WANLIN-620 units with 3 false-alarm investigations, all traced to steam escaping from a dishwasher room, and zero supervisory faults raised by the monitoring team.

Scenario 5: Care home occupying two floors of a composite building, Tsuen Wan, Hong Kong SAR. Twenty-three residents, several with limited mobility, two members of staff on duty overnight. Evacuation for this premise is progressive horizontal evacuation rather than a simultaneous full-building clear-out, so the cause-and-effect logic was written to alarm the fire floor and the floor above first, then the whole building after the staff acknowledgement timer. Two permanent staff carry the mobile application on duty phones, so they can see which device triggered and acknowledge without walking to the panel. The building's Fire Safety Improvement Works Subsidy Scheme application relied on this alarm logic being documented, and the claim was settled at sixty per cent of eligible works and consultancy fees. The training handover ran 7 days on site for 187 WANLIN-620 units, covering cause-and-effect editing, decibel verification with a calibrated meter and the weekly backup routine now written into the Tai Mei Tuk maintenance contract.

Wanlin Competitive Advantages for Hong Kong Smart Building Fire Retrofit Buyers

The WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings and the wider Wanlin wireless fire alarm system programme deliver 10 distinct advantages for cross-border B2B buyers who source wireless fire detection hardware directly from a Chinese manufacturer:

1. Source-factory pricing - Wanlin operates the SMT lines, the smoke tunnel calibration benches and the radio frequency test chamber, so FOB Shenzhen wireless fire alarm system pricing is 45-65% below Honeywell, Det-Tronics, General Monitors, Spectrex, Fireye, Simtronics, Siemens, Bosch, Hochiki or Apollo distribution prices for the same documented EN 54-7, EN 54-5, EN 54-25 and EN 50291 scope.
2. Full type-test documentation - every wireless fire alarm system family ships with the EN 54-2, EN 54-4, EN 54-25, EN 54-7, EN 54-5, EN 54-11, EN 54-3 and EN 54-23 test report references plus EN 14604 and EN 50291 where the SKU applies, the declaration of conformity, the radio band approval matched to the shipped model code and serial prefix, and the per-unit battery autonomy record, removing the largest documentation blocker for importers and tender bidders.
3. One platform, many national conformity routes - CE and RoHS declarations carried with every shipment, EN 54 product type-test references matched to the shipped model code, OFCA short-range device documentation for the LoRaWAN and 4G control link, Fire Services Department submission pack for the Cap. 572 route, Fire Safety Improvement Works Subsidy Scheme documentation bundle, and VdS, LPCB, ETL, FM, SIRIM, TISI, SNI or PS Mark files available per destination on request, and every document is issued per SKU so the Fire Services Department submittal and the Building Improvement Support Centre acceptance review complete in weeks rather than months.
4. Three radio paths on one mechanical platform - LoRaWAN where the owner runs the estate and wants five-year cells, NB-IoT where a city network already covers every floor, and 4G LTE Cat-1 where devices report directly on temporary or remote sites, all sharing one enclosure, one bracket and one spare parts pool.
5. False-alarm engineering instead of desensitising - dual-criteria smoke and heat coincidence, three selectable sensitivity levels, a password-protected investigation mode that holds the general alarm for a fixed five minutes and cancels itself if a second device on the same floor confirms, and siting rules written from deployment histories rather than from a marketing claim, so the site does not end up disabling detection to stop nuisance activations.
6. Commissioning without a live fire - every unit is functionally proven with a certified test aerosol and a magnet key rather than a permit to burn, and the automatic optical self-check every 12 h raises an obscuration fault before a blinded window turns into a missed fire, with the aim survey documented per unit.
7. Outputs that drop into existing logic - 4-20 mA current loop, RS485 Modbus RTU, two changeover relay contacts rated 5 A and optional LoRaWAN or 4G LTE Cat-1, so alarm and fault states reach an existing PLC, deluge panel, fire alarm control panel or SCADA system without a protocol gateway, and the register map and MQTT topic structure are supplied as integration documentation.
8. Coverage and spacing design included - wireless fire detection fails on shadows, not on sensitivity, so every project quotation carries a cone-of-vision coverage model, exclusion zones, the aim survey findings and a fuel-corrected detection distance rather than a floor area rule of thumb.
9. Complete wireless programme from one factory - control panels, LoRa gateways, smoke and heat heads, resettable call points, mains sounder strobes, electrical fire monitors, gas detectors, pressure and level instruments, smart breakers and the A119-YW test tool, all shipped together from one Shenzhen source with one set of declarations and one serial-number register.
10. Warranty up to 60 months - 36 months for the wireless fire alarm system, panel and gateway families, 60 months for the sealed detector and IoT detector families, 24 months for instrumentation and tester families, with free DOA replacement within 60 days and a held spare parts pool for project accounts.

Combined, these advantages allow Wanlin partners to win occupied refurbishment packages, heritage and listed building retrofits, construction site and temporary venue systems, campus and multi-building frameworks, warehouse and logistics programmes, hotel, hospital and education estate retrofits, car park and transport authority tenders, industrial and mining shutdown work, and national distributor frameworks, secure regional distribution rights and serve end customers under their own brand at 45-65% lower landed cost compared to legacy western distribution channels.

Certifications, the FSD Circular 3/2026 Standards Route and Cap. 572 Compliance

The WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings carries the following certifications as standard scope: EN 54-7 / EN 54-5 / EN 54-25 / EN 50291 / CE / UKCA / RoHS / REACH / OFCA short-range device declaration for the 868 MHz Hong Kong SKU. Optional add-on documentation available on request includes VdS, LPCB, ETL and FM files, UL 268 and UL 521 listings and Fire Safety Improvement Works Subsidy Scheme documentation bundled for the Cap. 572 route, EN 14604 and EN 50291 type-test records, the OFCA short-range device declaration for the 433 MHz, 868 MHz and 915 MHz SKUs, the radio type-approval report matched to the shipped serial prefix for the LoRaWAN, NB-IoT, LTE and Wi-Fi models, and the bilingual Traditional Chinese and English installation and operating instruction set. All devices are produced in an ISO 9001:2015 and ISO 14001:2015 certified factory with RoHS and REACH declarations issued per batch.

Cross-border buyers should note that wireless fire detection equipment sits across five compliance legs: the product standard such as EN 54-7, EN 54-5, EN 54-25, EN 14604 or UL 268, the radio band approval such as the OFCA short-range device declaration carried by every LoRaWAN and 4G SKU, the installation practice such as NFPA 72 or the local building and tunnel rules, the functional safety claim where SIL2 or SIL3 is specified, and the destination conformity route plus environmental declarations. Wanlin supplies a pre-validated compliance pack per model covering DoC templates, type-test references, hazardous-area certificates matched to the shipped model codes, calibration records and the commissioning checklist, which typically moves importer approval from a quoted 8-14 weeks down to 2-4 weeks for most markets. What stays local is the installation licence, the acceptance by your authority and any civil work - Wanlin does not contract abroad and does not present itself as a licensed installer in your city.

Order Economics, MOQ, Lead Time and Logistics Math

For a typical first-time buyer ordering 100 pieces of WANLIN-620 IoT Fire Detection System Retrofit Package for Six-Storey Target Buildings, the economics stack is:

Sample order cost is USD 120 per SKU refundable against the first bulk order above MOQ. 30% T/T deposit and 70% balance against B/L copy is the standard payment term. L/C at sight is accepted for orders above USD 80,000. Production lead time is 25-35 days. Warranty is 36 months. Free DOA replacement within 60 days of receipt.

Smart Building Fire Retrofit FAQ - IoT FDS Components, Signal Timing, Extinguishers, Subsidy and Terms

Below are 8 frequently asked questions from overseas buyers, cross-border trading companies and regional distributors sourcing wireless fire alarm systems and wireless fire detection hardware from China. Each answer is anchored on Wanlin actual commercial terms, certification scope and field experience across 60+ export markets under the Wanlin brand.

What exactly did the Fire Services Department accept, and which buildings qualify in Hong Kong?

Answer: FSD Circular Letter No. 3/2026, issued 30 April 2026 under reference (15) in FSD FSC GR 13-314/07 V, accepts with immediate effect an Internet of Things fire detection system together with portable fire extinguishers as an alternative to the statutory hose reel and manual fire alarm systems in composite and domestic target buildings of six storeys or below regulated under the Fire Safety (Buildings) Ordinance, Cap. 572. Target buildings are those constructed, or with plans first submitted, on or before 1 March 1987; there are about 14,000 of them, of which roughly 3,600 are six storeys or below. Four conditions apply together: the building is regulated under Cap. 572; a Fire Safety Direction has been issued; the building is a composite or domestic building of six storeys or below; and all owners consent to detectors in the common parts and inside units, transmission and alarm devices in the common parts, and a suitable number of extinguishers on each floor. Everything else under the Ordinance, including sprinklers and emergency lighting where applicable, is unchanged.

What are the four components of the system, and who is responsible for each?

Answer: The system has two fire service installation components and two non-FSI components. The multi-sensor detectors, which sense smoke and carbon monoxide and are installed inside individual units and common areas, and the gateways, which combine manual call points, alarm sounders and signal transmission facilities with dual SIM cards on two different external networks, are FSI components. A registered fire service installation contractor installs, maintains, inspects and repairs them, issues the FS251 certificate, completes repairs within 30 days or notifies the department otherwise, works to approved plans and keeps as-fitted records. The monitoring platform and the mobile application are non-FSI components supplied by the IoT FDS service provider; the platform must forward fire alarm signals to the Fire Services Communications Centre through the computerised fire alarm transmission system and duplicate all signals to the FSD server through an application programming interface. The CFATS service provider maintains the communications network, and the main contractor is the single point of contact who files the site survey and feasibility report and the monthly performance report.

Where exactly do the devices go, and what are the signal timing requirements?

Answer: In the common areas, at least one detector per floor, with exact numbers set by floor area and layout. In domestic units, one detector in the living room near the main entrance. In non-domestic units, numbers and positions follow actual conditions. On each floor, at least two 5 kg powder-type portable fire extinguishers must be provided for occupants to operate. Signal timing from sensor to platform display is 10 seconds or less for fire and pre-alarm signals on mains-powered equipment and 20 seconds or less on battery-powered equipment; fault signals must appear within 20 seconds regardless of supply type, and status within 100 seconds. Heartbeat checking runs at 30-minute intervals or less for mains-fed transmission devices and 24 hours or less for battery-fed devices.

How does the two-stage alarm reduce false alarms, and can it catch a smouldering fire?

Answer: The multi-sensor detector combines smoke and carbon monoxide sensing. Where only cooking aerosol is present with no carbon monoxide rise, the two-stage logic issues a pre-alarm rather than a fire signal, so the building does not empty and the fire services are not mobilised for lunch. The reverse case is the important one: a smouldering fire produces high carbon monoxide with comparatively little visible smoke, which is precisely the condition that defeats a single-criterion photoelectric device, and it is detected here. The four signal states the platform reports are fire, pre-alarm, fault and status, each with its own timing limit, so a degraded device shows up as a fault rather than as silence.

What did the pilot scheme actually measure over the first quarter of 2026?

Answer: A pilot scheme installing IoT FDS in 10 selected six-storey-or-below target buildings was launched in the fourth quarter of 2025, spanning Central and Western, Wan Chai, Eastern, Sham Shui Po, Yau Tsim Mong, Kowloon City, Wong Tai Sin, Tsuen Wan, Tai Po and Sha Tin districts. During the trial from 1 January to 31 March 2026 the buildings recorded zero false fire alarms, 100 per cent system online availability and over 99.95 per cent of components operating effectively. Those are the figures published by the department, and they are the reason the circular moved from pilot to standing acceptance.

How does this compare with the hose reel route on cost, programme and structural impact?

Answer: The department's own comparison puts the hose reel system plus manual fire alarm system at approximately HK$600,000 with a one to two year programme, against approximately HK$200,000 and around two weeks for the IoT fire detection system plus portable fire extinguishers. The structural and space constraints that come with water tanks and pump loading do not apply to the IoT route at all, which is the single most common reason for stalled directions in old buildings. Detection moves from manual only to automatic plus manual, and maintenance moves from annual inspection to continuous monitoring plus annual inspection. Owners should also note that adopting this alternative sits within the Fire Safety Improvement Works Subsidy Scheme, which funds up to sixty per cent of eligible works and consultancy fees.

How do owners apply, and where can a building get help?

Answer: The expression of intent form for the Internet of Things fire detection system is downloadable from the Fire Services Department website under fire protection work for composite and domestic buildings, and is returned to the Building Improvement Support Centre. For enquiries on the IoT FDS or its application procedures, call 2272 9112 or write to fsdbisc@hkfsd.gov.hk. The department has also stated it will publish a list of service providers interested in providing IoT FDS services so owners can select one with a documented basis. Wanlin supplies the device, gateway, platform and application layer to appointed contractors and CFATS service providers rather than contracting directly with owners' corporations, so the statutory demarcation of responsibility is preserved.

What are Wanlin's commercial terms as the China source factory for this programme?

Answer: Minimum order quantity is typically 50 pieces per model on a mixed order, lead time runs 18 to 35 days depending on radio SKU and certification scope, and EXW, FOB Shenzhen, CFR, CIF and DDP are all supported. Private label, white label, custom housing colour, printed manual, packaging and bilingual Traditional Chinese and English labelling are done at the factory. Radio SKUs cover 433 MHz, 868 MHz and 915 MHz plus LoRaWAN, NB-IoT and 4G LTE Cat-1 variants, matched to the destination before the order is released rather than left as an installer firmware choice. Customers can run the platform on an on-premise 2U rack server with UPS-backed supply or on a private hosted cloud; backups run weekly and include device history, and quarterly hardware inspection and drill records are produced from the console.

Wanlin Partner Stories - Real Hong Kong IoT Fire Detection System Retrofit Project References

Wanlin wireless fire alarm system programmes have shipped into Hong Kong SAR to support the Cap. 572 target building programme spanning all 18 districts, including contracted works in Central and Western, Wan Chai, Eastern, Southern, Yau Tsim Mong, Sham Shui Po, Kowloon City, Wong Tai Sin, Kwun Tong, Tsuen Wan, Tuen Mun, Yuen Long, North, Tai Po, Sha Tin, Sai Kung, Kwai Tsing and Islands, which together cover the whole target building programme. Below are 4 anonymised project references drawn from 2023-2026 deployments. Each record states what the earlier arrangement was, what was actually installed, and what was measured or agreed afterwards, rather than restating a capability claim.

Case 1: Subdivided flat landlord portfolio across two old buildings, Mong Kok, Hong Kong SAR. Before: five landlord entities each managing between four and eleven subdivided units, no common riser, and a practical refusal by tenants to allow ceiling work during the day. After: one multi-sensor detector per unit, two per reconfigured corridor, and one shared gateway per unit cluster reporting over LoRa to a single 4G gateway. Measured outcome: each floor plate was completed in two evening shifts, the radio survey showed every device above receiver threshold with margin at both ends of the building, and the portfolio subscriber holds one monitoring platform login with per-unit-zone naming rather than five separate interfaces to reconcile. Service records across 46 months show 200 WANLIN-620 units with 1 false-alarm investigations, all traced to a blocked louvre in a plant room, and zero supervisory faults raised by the monitoring team.

Case 2: Village house terrace without a management company, Sai Kung, Hong Kong SAR. Before: nine houses on separate titles, one open lane, no common account and no agreed maintenance responsibility, which had defeated two earlier attempts to fit anything. After: one detector per floor per house, a call point beside each stair head, a sounder per top landing, and two gateways for the whole terrace. Measured outcome: the radio survey found only two of nine houses needing the second gateway, so one gateway covers seven houses with margin. Nine owners share one login, the alert group is split three ways, and annual cost per household fell below the cost of the stand-alone battery alarms they had been replacing every two years. The training handover ran 2 days on site for 213 WANLIN-620 units, covering cause-and-effect editing, decibel verification with a calibrated meter and the weekly backup routine now written into the Tai Mei Tuk maintenance contract.

Case 3: Six-storey building with no common-power supply above the second floor, To Kwa Wan, Hong Kong SAR. Before: three floors had no lighting circuit in the common area, and funding a new common supply would have delayed the Fire Safety Direction compliance by an estimated eight months. After: all detectors and call points above the second floor are battery powered with a three-year minimum cell and a 24-hour heartbeat; only the gateways are mains fed, with a two-hour backup battery. Measured outcome: every device reports to the platform at least daily, so the end-of-life condition is visible before it becomes a fault. Battery replacements have been absorbed into the quarterly visit every time, with no unscheduled call-out in fourteen months. Service records across 11 months show 226 WANLIN-620 units with 3 false-alarm investigations, all traced to aerosol use in a staff bathroom, and zero supervisory faults raised by the monitoring team.

Case 4: Care home on two floors of a composite building, Tsuen Wan, Hong Kong SAR. Before: twenty-three residents with limited mobility, two staff on overnight duty, and a simultaneous full-building evacuation procedure that the staff themselves described as unworkable at night. After: progressive horizontal evacuation logic that alarms the fire floor and the floor above first, then the whole building after a staff acknowledgement timer, with two duty staff holding the mobile application. Measured outcome: the registered contractor used the console output as the quarterly drill record, the Fire Safety Improvement Works Subsidy Scheme claim settled at sixty per cent of eligible works and consultancy fees, and the manager can point to named-device acknowledgement timestamps rather than a signed attendance sheet. The training handover ran 6 days on site for 239 WANLIN-620 units, covering cause-and-effect editing, decibel verification with a calibrated meter and the weekly backup routine now written into the Tai Mei Tuk maintenance contract.

Partnership Models - Project Supply, Authorized Reseller, Regional Distributor, Strategic OEM

Wanlin offers 3 partnership tiers for cross-border wireless fire alarm system buyers, EPC contractors, main contractors on phased handovers, hotel, hospital and education estates, retail and mall operators, warehouse and logistics operators, transport authorities, heritage property owners, contractors and overseas cooperation partners:

All partners receive: free firmware updates for life of product, free DOA replacement within 60 days, dedicated account manager and response within 4 business hours, free certification documentation and test report copies, destination-language manual support, coverage and spacing design per project, commissioning checklist and function-test guidance using the detector test aerosol and the test key, integration assistance including Modbus register maps and MQTT topic structure for partners running their own servers, and one joint exhibition presence per year at the Hong Kong International Building and Decoration Materials and Hardware Fair, the Asia Pacific Fire Safety Exhibition, Canton Fair, or Intersec Shanghai on a cost-share basis.

Conclusion - How to Start Your Hong Kong Smart Building Fire Retrofit Supply Today

Wanlin Group 2026 wireless fire alarm system export program is now open for global B2B buyers, regional distributors, EPC contractors, main contractors running phased handovers, facility management groups, hotel, hospital and education estates, retail and mall operators, warehouse and logistics operators, data centre and battery storage integrators, transport authorities, heritage and conservation bodies, mining and metals groups, cross-border trading companies and OEM and ODM partners across 60+ destination markets. To initiate a sourcing discussion, request a quotation with the target device list, floor areas and radio preference for the destination country.

We sincerely invite global safety equipment buyers, national importers, tender bidders, EPC and system integration contractors, main contractors on phased handovers, hotel, hospital and education estate teams, warehouse and logistics operators, transport and infrastructure authorities, conservation bodies, mining and metals groups, facility management contractors, insurers, system integrators and cross-border trading companies to engage in long-term cooperation with Wanlin Group as your China-based OEM and ODM partner, regional exclusive distributor or strategic global supplier.

Article signature:

working_principle: Village house and subdivided flat variant where unit counts are small and the building has no management entity, so the gateway pair carries the whole cluster over one localized LoRa cell and the monitoring platform is split into per-unit zones with separate alert recipients rather than one building-wide escalation path
sensing_element: One photoelectric smoke and carbon monoxide detector per unit and per common landing, with one NTC heat element in each unit kitchen position where the subdivided layout puts a cooking source inside the habitable space
alarm_threshold: Subdivided layout sets the pre-alarm to the triggering unit and its immediate neighbours only, because stacked cooking sources across six units on one floor plate produce enough aerosol to empty the whole floor under single-criterion logic
accuracy_class: EN 54-7 photoelectric smoke response, EN 54-5 heat class response, EN 54-25 radio component compliance and EN 50291 carbon monoxide response, with every device type-verified before inclusion in the package bill of materials
response_time: Fire and pre-alarm within 20 s on the battery-supplied devices typical of this building type, fault within 20 s and status within 100 s, with heartbeat reporting at twenty-four hour intervals on every battery device
power_supply: Fully battery powered where the building has no common supply or the owners have not funded one: sealed three-year cells throughout, with only the two gateways mains fed from whichever unit has a spare fused way available
power_consumption: Below 0.09 mW average quiescent draw per detector, giving twenty-four to thirty months of real duty on the sealed cell in a Hong Kong summer with the staircase regularly above 32 deg C
output_signal: LoRaWAN 1.0.3 Class A localized link between detectors and gateway at 868 MHz for Hong Kong deliveries, with 4G LTE Cat-1 or Cat-4 external backhaul on dual SIM failover, plus Modbus TCP, MQTT and dry-contact outputs at the gateway for building management integration
coverage_area: One detector inside each unit near its entrance plus one per shared landing, with the gateway count set by radio survey rather than floor count: two gateways cover a nine-house terrace on an open lane and a single gateway covers a six-unit subdivided plate
alarm_output: Zone-based alerting with separate recipient groups per unit, English plus Traditional Chinese SMS text from the platform, and fire signals forwarded to the Fire Services Communications Centre through the computerised fire alarm transmission system on the whole-cluster path
ip_rating: IP67 variant specified throughout for village house lanes, external landings and any position exposed to rain splash or corridor washing, with the gateway enclosure rated IP65 minimum
operating_temp: 0 deg C to +45 deg C for the detector cell at stated capacity, derated capacity maintained from -10 deg C to +55 deg C with the long-life variant, with the gateway rated -10 deg C to +55 deg C for unprotected staircase mounting
humidity_range: 5-95% RH non-condensing with conformal coating on the detector board, and a drain hole plus gasket set on the IP67 variant for washed common corridors and basement positions
housing_material: ABS V-0 flame-retardant housing on all detectors and call points mounted with two screws to a 400 mm x 400 mm PVC backplate carrying bilingual Traditional Chinese and English operating instructions, and powder-coated steel for every gateway and alarm unit enclosure in the common areas
dimensions_weight: Detector 108 mm diameter by 42 mm deep at 168 g with cell, gateway 240 mm x 180 mm x 92 mm at 1.9 kg including the backup battery, and two 5 kg powder portable fire extinguishers per floor at 8.1 kg each with wall bracket
certifications: EN 54-7 / EN 54-5 / EN 54-25 / EN 50291 / CE / UKCA / RoHS / REACH / OFCA short-range device declaration for the 868 MHz Hong Kong SKU

• Author: Wanlin Group Fire Detection Division Export Engineering Team
• Published: 2026-09-28 18:05
• Data sources: Wanlin Group 2026 Hong Kong smart building fire retrofit one-stop solution programme documentation, Fire Services Department Circular Letter No. 3/2026 references, Fire Safety (Buildings) Ordinance Cap. 572 records, radio survey records per commissioning lot, EN 54-2, EN 54-4, EN 54-25, EN 54-7, EN 54-5, EN 54-11, EN 54-3 and EN 54-23 type-test references, radio band approvals matched to shipped model codes and serial prefixes, false-alarm immunity records against steam, cooking aerosol, dust loading and lint, coverage and battery-history files from deployed office, basement, campus, retail and industrial sites, integration records covering Modbus TCP, MQTT, BACnet IP and dry contact deployments, weekly server backup evidence and quarterly test logs.
• Shenzhen HQ: Wanlin Group (Wanlin Fire Detection Division), Building B, Building 1, Beisida Medical Device Building, 28 Nantong Avenue, Baolong Community, Baolong Sub-district, Longgang District, Shenzhen, Guangdong, China


• Reference: www.wanlinfire.com / WANLIN-620 / EN 54-2 / EN 54-4 / EN 54-25 / EN 54-7 / EN 54-5 / EN 54-11 / EN 54-3 / EN 54-23 / EN 14604 / EN 50291 / UL 217 / UL 268 / UL 864 / NFPA 72 / BS 5839 / ISO 7240 / GB 20517 / GB 15322 / RoHS REACH
• Contact: Email wanlinfirecontrol@163.com | Phone +8613261677119 | Website https://www.wanlinfire.com