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Mains Powered Smoke Alarms & Heat Alarms with Self-Charging 10 Year Back-up Battery - Firehawk RB Series

4.7 out of 5 stars
Choose a product To see stock availability
From: £31.79 inc VAT
£26.49 ex VAT
Product Overview

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 FHN250RB optical smoke alarms and FHN450RB 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.

  • 230V mains powered with self-charging battery backup
  • Lithium back-up battery lasts the full 10 year life of the alarms
  • 10 year manufacturer's warranty
  • Available in two versions:
    • FHN250RB optical smoke alarm – suitable for most rooms including hallways, landings, living rooms, and bedrooms
    • FHN450RB heat alarm – suitable for rooms likely to have steam, dust, or fumes like kitchens and garages
  • Also available with replaceable alkaline back-up batteries
  • 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 reduce false alarms and ensure quick detection of fires
  • End of life warning chirp when the alarm head needs replacing, which can be silenced overnight
  • Combined large test and silence button for ease of maintenance
  • Suitable for installations complying to BS 5839-6 Grade D1
  • 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 FHN series alarms are not compatible with the older FH models.

Interlink

The table below shows all alarms which can interlink via cable with the Firehawk FHN250RB and FHN450RB mains powered smoke & heat alarms.

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

Mains-Powered Alarms

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

Accessories

Model Description Power Interlink
FHN600Remote Battery Powered Wireless Remote Control 1x CR2025 Coin Cell IR (infrared)

Technical Data
Product Code

FHN250RB Optical Smoke Alarm:  FIFHN250RB

FHN450RB Heat Alarm:  FIFHN450RB

Brand Firehawk
Back-Up Battery

Sealed Self-Charging Lithium

Dimensions (HxDia)

FHN250RB Smoke: 55 x 113mm

FHN450RB Heat: 69 x 113mm

Operating Temperature

0°C to 40°C

Relative Humidity

< 85%

Storage Temperature

5°C to 30°C

Weight

FIFHN250RB: 0.24kg

FIFHN450RB: 0.24kg

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

Lithium back-up battery lasts the full 10 year life of the alarms

Fast-Fix mounting base design for quick, easy installation

Alarms can be removed quickly to easily replace the batteries

Combined large test and silence button for ease of maintenance

Pricing & Availability

Model Stock Price
FHN250RB Optical Smoke Alarm
Product Code: FIFHN250RB
Stock Level:
More than 20 in stock Expected dispatch: 28th May
Price:

£31.79 inc VAT

£26.49 ex VAT

FHN450RB Heat Alarm
Product Code: FIFHN450RB
Stock Level:
More than 20 in stock Expected dispatch: 28th May
Price:

£35.63 inc VAT

£29.69 ex VAT

Delivery Options

The following delivery options are available on this product.

Standard Delivery

£3.19 inc VAT - Orders will be delivered in 2-3 working days with Evri

Next Working Day Delivery

£6.19 inc VAT - Orders will be delivered the next working day with Evri

For dispatch today order within

Excellent Warranty

This product is supplied with a 10 year manufacturers warranty as standard

Customer Reviews

3 customers have given this product an overall rating of 4.7 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 4 / 5 Stars

Reviewed by: K C

Easy to fit, working ok so far

Published on: 17th November 2023

Rating: 5 / 5 Stars

Reviewed by: J H

Neat,long backup battery life and quickly fitted. very happy with my purchase.

Published on: 29th July 2023

Rating: 5 / 5 Stars

Reviewed by: J H

Neat, long backup battery life and quickly fitted. very happy with my purchase.

Published on: 29th July 2023

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