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Mains Powered Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - Firehawk BB Series

Discontinued Product - No Compatible Replacement

Please Note: The manufacturer has discontinued this FH mains-powered alarm series and is no longer supplying compatible alternatives. Since it is not possible to interlink alarms from different manufacturers, it is recommended to replace all FH models in the premises with Firehawk's new FHN range.

alternative product

Firehawk FHN Mains Powered Alarms with Alkaline Battery

These Firehawk mains-powered smoke and heat alarms with hardwire interlink and replaceable AAA alkaline back-up batteries are suitable for Grade D2 systems to warn all occupants of a fire.

  • 230V mains power with alkaline battery backup
  • 6 years manufacturer's warranty
  • Hardwire interlink up to 15 Firehawk FHN smoke and heat alarms.
  • Also suitable for the 2022 Scottish legislation

£18.83 inc VAT

£15.69 ex VAT

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Product Overview

The FH250BB optical smoke alarms and FH450BB 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.

  • 230V mains powered with alkaline battery backup
  • 3 x AAA alkaline battery backup (included)
  • 6 year manufacturer's warranty
  • Available in two versions:
    • FH250BB optical smoke alarm – suitable for most rooms including hallways, landings, living rooms, and bedrooms
    • FH450BB heat alarm – suitable for rooms likely to have steam, dust, or fumes like kitchens and garages
  • Also available with lithium back-up batteries that last the full 10 year life of the alarms
  • Fast-Fix design for quick installation using Push-Fit connectors
  • Up to 15 Firehawk mains-powered smoke and heat alarms can interlink in one system
  • Advanced sensor technology to ensure quick detection of fires and reduced false alarms
  • End of life warning chirp can be silenced up to 10 hours
  • Combined large test and silence button for ease of maintenance
  • Suitable for installations complying to BS 5839-6 Grade D2
  • CE marked and certified to EN 14604: 2005 (smoke alarm) / Kitemarked to BS 5446-2: 2003 (heat alarm)
  • This alarm is also suitable for the updated 2022 Scottish legislation for fire alarms in homes

Please Note: these FH series alarms are not compatible with the newer FHN models.

Interlink

The table below shows all alarms which can interlink via cable with the Firehawk FH250BB and FH450BB mains powered smoke & heat alarms.

Please Note: these FH series alarms are not compatible with the newer FHN models.

Model Description Interlink
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

Technical Data
Product Code

FH250BB Optical Smoke Alarm:  FIFH250BB

FH450BB Heat Alarm:  FIFH450BB

Brand Firehawk
Back-Up Battery

3 x AAA Alkaline Replaceable Batteries

Dimensions (HxDia)

FH250BB Smoke: 55 x 113mm

FH450BB 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

FIFH250BB: 0.25kg

FIFH450BB: 0.21kg

Product Datasheets
FAQs (1)
Q. Can I put my smoke alarm on the wall, or must it be mounted on the ceiling?
A.

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.

Key Product Features

Fast-Fix mounting base design for quick, easy installation

3x AAA alkaline battery backup and fixing pack with each alarm

Alarms can be removed quickly to easily replace the batteries

Combined large test and silence button for ease of maintenance

Looking for more information?

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