These Firehawk optical smoke and heat alarms are mains-powered and fitted with sealed self-charging back-up batteries designed to last their full 10 year lifespan without needing to be replaced. Suitable for Grade D1 installations and Scottish regulations, Firehawk FH250RB optical smoke alarms and FH450RB heat alarms can interlink in a system of up to 15 alarms to warn all occupants throughout the whole house if one detects a possible fire. The supplied Fast-Fix bases also allow for the easy replacement or swapping of smoke and heat alarm heads from the same range if required. An "end of life" warning chirp will sound when the whole unit needs replacing after 10 years, but this can be silenced for 10 hours in case it starts during the night.
The table below shows all alarms which can interlink via cable with the Firehawk FH250RB and FH450RB mains powered smoke & heat alarms.
|FH250BB||Mains Powered Optical Smoke Alarm with Alkaline Battery Backup||Hardwire|
|FH450BB||Mains Powered Heat Alarm with Alkaline Battery Backup||Hardwire|
|FH250RB||Mains Powered Optical Smoke Alarm with Sealed Lithium Battery Backup||Hardwire|
|FH450RB||Mains Powered Heat Alarm with Sealed Lithium Battery Backup||Hardwire|
Sealed Self-Charging Lithium
FH250RB Smoke: 55 x 113mm
FH450RB Heat: 69 x 113mm
0°C to 40°C
5°C to 30°C
We recommend using an optical smoke alarm in hallways, living rooms, dining rooms and bedrooms, as they are good at detecting smouldering fires from soft furnishings and are less likely to be set off by cooking fumes from a connected kitchen.
Ionisation alarms are recommended for landings as they are designed to react quickly to fast flaming fires.
Heat alarms are recommended for kitchens and garages as they do not sound false alarms from cooking fumes, vehicle fumes or steam.
All our mains powered alarms have a battery backup because, although mains powered alarms without this option do exist (BS5839 part 6 grade E), we regard them as far too dangerous. This is because a lot of fires are caused by electrical faults which would leave the building unprotected against fire if the smoke alarms had no backup battery. With our mains powered alarms you will always be protected.
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.
It is necessary that an electrician installs mains powered smoke alarms.
FH250RB Optical Smoke Alarm
Product Code: FIFH250RB
12 in stock Expected dispatch: 25th Jan
£27.98 inc VAT
£23.32 ex VAT
FH450RB Heat Alarm
Product Code: FIFH450RB
Available for pre-order Expected dispatch: 16th Feb
£33.59 inc VAT
£27.99 ex VAT
The following delivery options are available on this product.
If you have any questions or would like more information about this product you can ask one of our specialists.