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The FHN250BB optical smoke alarms and FHN450BB heat alarms from Firehawk are mains-powered alarms with hardwire interlink, allowing up to 15 compatible alarms in the house to sound a warning to occupants when one detects a possible fire. These models feature replaceable AAA alkaline back-up batteries to ensure continued fire detection during a power cut, or if mains-power is turned off for other reasons like decorating or a blown light bulb. The unique Fast-Fix mounting base design allows alarms to be easily removed for cleaning and replacing batteries without needing to cut the power or worry about wiring, and the alarms will chirp an "end of life" warning (which can be silenced overnight) when the whole unit needs replacing after 10 years.
Please Note: these FHN series alarms are not compatible with the older FH models.
The table below shows all alarms which can interlink via cable with the Firehawk FHN250BB and FHN450BB mains powered smoke & heat alarms.
Please Note: these FHN series alarms are not compatible with the older FH models.
Model | Description | Battery Backup | Interlink |
---|---|---|---|
FHN250BB | Mains Powered Optical Smoke Alarm | 3x AAA Alkaline (included) | Hardwire |
FHN450BB | Mains Powered Heat Alarm | 3x AAA Alkaline (included) | Hardwire |
FHN250RB | Mains Powered Optical Smoke Alarm | 10 Year Sealed Lithium | Hardwire |
FHN450RB | Mains Powered Heat Alarm | 10 Year Sealed Lithium | Hardwire |
Model | Description | Power | Interlink |
---|---|---|---|
FHN600Remote | Battery Powered Wireless Remote Control | 1x CR2025 Coin Cell | IR (infrared) |
Product Code |
FHN250BB Optical Smoke Alarm: FIFHN250BB FHN450BB Heat Alarm: FIFHN450BB |
---|---|
Brand | Firehawk |
Back-Up Battery | 3 x AAA Alkaline Replaceable Batteries |
Dimensions (HxDia) | FHN250BB Smoke: 55 x 113mm FHN450BB Heat: 69 x 113mm |
Operating Temperature | 0°C to 40°C |
Relative Humidity | < 85% |
Sound Output | 85dB |
Storage Temperature | 5°C to 30°C |
Weight | FIFHN250BB: 0.25kg FIFHN450BB: 0.25kg |
Product Datasheets |
The best location to install your smoke alarm is in the centre of the ceiling rather than on the wall.
During a fire, smoke initially rises and then spreads horizontally. Placing the smoke alarm in the centre of your ceiling means that it is closest to all four points of your room. This ensures that you receive the earliest possible warning of a fire.
For more information, read our guide to positioning your smoke alarm and guide to which smoke alarms are best for each room.
Model | Stock | Price |
---|---|---|
FHN250BB Optical Smoke Alarm Product Code: FIFHN250BB |
Stock Level:
More than 20 in stock Expected dispatch: Tomorrow
|
Price:
£18.83 inc VAT £15.69 ex VAT |
FHN450BB Heat Alarm Product Code: FIFHN450BB |
Stock Level:
More than 20 in stock Expected dispatch: Tomorrow
|
Price:
£19.31 inc VAT £16.09 ex VAT |
The following delivery options are available on this product.
1 customer has given this product an overall rating of 5 out of 5
Rating: 5 / 5 Stars
Reviewed by: S D
As promised. Very easy to install as a replacement. Very good value for money and comes with an excellent provenance.
Published on: 30th March 2023
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