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0800 612 6537

Radio-Interlinked Heat Alarm - FireAngel WHT637

In Stock
56.09 ex VAT
67.31 inc VAT
Product Overview

Using advanced heat sensing technology (also called Thermistek), the FireAngel WHT637 radio-interlinked heat alarm reacts quickly when significant rate-of-rise in temperature is detected. Ideal for areas where a smoke alarm could be prone to false triggering, e.g. kitchen or garage, the WHT637 is capable of wirelessly interconnecting with up to 50 alarms using radio-frequency signal. Enabling all interlinked alarms to sound if one detects a fire, a wireless smoke and heat alarm system within the home would ensure you receive the earliest possible warning of fire.

  • Battery powered heat alarm - 10 year sealed lithium battery
  • CE marked and Kitemarked to BS 5446-2
  • Single test and hush button
  • Can be wirelessly interlinked with up to 50 radio-interlinked alarms
  • An interlinked system provides the earliest possible warning of fire
  • Radio-frequency range: 200m in free space, up to 35m in buildings
  • Heat sensor provides quick detection of significant rate-of-rise in temperature
  • Locate function: helps you find the alarm that activated an interlinked system
  • 7 years warranty - EXCLUSIVE to Safelincs
  • Suitable for installations complying to BS 5839-6: 2013 Grade F
  • Available with FREE pre-connection service
  • Free Shipping
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
Whats Included

The FireAngel WHT637 Heat Alarm Kits are supplied as standard with some exclusive extras that make purchasing these alarms easier and more cost-effective, including:

  • 7 year warranty - EXCLUSIVE to Safelincs
  • FREE delivery on your order
  • FREE after the fire replacement guarantee
  • Available with FREE pre-connection service
  • WHT-630 Heat Alarm with self-adhesive mounting pad

The table below shows all the units that can interconnect with the FireAngel radio-interlinked series.

Alarms from the Same Series

Model Number
Type of unit
Type of interconnection
WST637 Optical Smoke Alarm Radio-interlinked
WHT637 Heat Alarm Radio-interlinked

Compatible Alarms

Model Number Type of unit Type of interconnection
WST-230 Mains Powered Optical Smoke Alarm Radio-interlinked
WHT-230 Mains Powered Heat Alarm Radio-interlinked

Carbon Monoxide Alarms

Model Number
Type of unit
Type of interconnection
W7-CO-10X Carbon Monoxide Alarm Radio-interlinked

Ancillary Products

Model Number
Type of unit
Type of interconnection
W2-SVP-630 Wireless Strobe and Vibrating Pad Radio-interlinked
W2-LFS-630 Wireless Low Frequency Sounder Radio-interlinked

Technical Data

This is the technical data for the Radio-Interlinked Heat Alarm - FireAngel WHT637.

Product Code FAWHT637
Weight 0.26kg
Dimensions (HxDia) 60x132mm
Battery Type 10 year sealed lithium battery
Sound Output 85dB at 3 metres
Radio-Frequency Range Free Space: Up to 200m
In Buildings: Up to 35m
Temperature Trigger +54 C to +65 C
Relative Humidity (non-condensing) Up to 90%

Data Sheets

Pricing & Availability

Model Stock Levels Price Weight
Product Code: FAWHT637
In Stock

56.09 ex VAT

67.31 inc VAT


Customer Reviews

4 customers have rated this product and it has an overall rating of 4.5 out of 5

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

5 / 5 Stars

Reviewed by: PM

Excellent - just works

Published on: 13th January 2017

4 / 5 Stars

Reviewed by: DK

Easy to set up

Published on: 19th September 2016

4 / 5 Stars

Reviewed by: SP


Published on: 27th March 2016

5 / 5 Stars

Reviewed by: IH

Nice unit that's easy to install

Published on: 16th February 2016

Delivery Options

The following delivery options are available on this product.

FREE Next Day Delivery

Delivered the next working day by UK Mail FREE of charge - More info

For delivery on order within

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