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Mains Powered Heat Alarm with Back-up Battery- Kidde Firex KF3

Discontinued Product

This product has been discontinued and is no longer available to buy. The recommended replacement is the Kidde KF30.

Product Overview
Kidde Firex KF3 and KF3R are mains powered interlinking heat alarms.  These hard wired units have battery back-up cells and can be interlinked with other units from the series to create all round fire protection within the home.  Heat alarms are the ideal detectors for kitchens and garages and are perfect for reducing nuisance alarms.
  • 230V Hard-wired heat alarm
  • 9V Alkaline or Lithium back-up battery options
  • 6 year warranty
  • A maximum of 24 units can be interlinked via signal cable
  • Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
  • Kitemarked to BS EN 5446-2:2003
  • CE marked
  • LED display
  • Test/Hush button
  • Low battery warning chirp
  • Heat alarms reduce the number of false alarms
  • The units are ideal for kitchens and garages
  • Supplied with free dust cover (to protect unit temporarily if you carry out dusty work)

Please Note: The Kidde Firex KF3 (previously the Kidde 4899) and KF3R (previously the Kidde 4892) are replacements for the Kidde 3239HI  and Kidde 3239HILL can be interlinked however the new models cannot be used on the same base plates and use different connector blocks.

Interlink

The table below shows all the units that can interlink with the KE4899 (KF3) and KE4892 (KF3R).

Alarms from the same series
Model Number
Type of unit
Type of interlink
Optical Alarm
Hard wire interlink
Optical Alarm with Rechargeable Lithium Cell
Hard wire interlink
Heat Alarm
Hard wire interlink
Heat Alarm with Rechargeable Lithium Cell
Hard wire interlink
Ionisation Alarm
Hard wire interlink
Ionisation Alarm with Rechargeable Lithium Cell
Hard wire interlink
Carbon Monoxide Alarms
Model Number
Type of unit
Type of interlink
CO Detector with Rechargeable Lithium Cell
Hard wire interlink
Compatible Alarms
Model Number
Type of unit
Type of interlink
KE1239HI
Ionisation Alarm with Alkaline Battery
Hard wire interlink
KE1239HILL
Ionisation Alarm with Lithium Battery
Hard wire interlink
KE2239HI
Optical Alarm with Alkaline Battery
Hard wire interlink
KE2239HILL
Optical Alarm with Lithium Battery
Hard wire interlink
KE3239HI
Heat Alarm with Alkaline Battery
Hard wire interlink
KE3239HILL
Heat Alarm with Lithium Battery
Hard wire interlink
I240C
Ionisation Alarm with Alkaline Battery
Hard wire interlink
PADC240
Optical Alarm with Alkaline Battery
Hard wire interlink
KE4973
Optical Alarm with Alkaline Battery
Hard wire interlink
KE4985
Optical Alarm with Lithium Battery
Hard wire interlink
KE4899
Heat Alarm with Alkaline Battery
Hard wire interlink
KE4892
Heat Alarm with Lithium Battery
Hard wire interlink
KE4870
Ionisation Alarm with Alkaline Battery
Hard wire interlink
KE4881
Ionisation Alarm with Lithium Battery
Hard wire interlink
Technical Data
Product Code

Kidde KF3 - Alkaline Battery Back-up:  KEKF3

Kidde KF3R - Lithium Battery Back-up:  KEKF3R

Brand Kidde
Back-Up Battery

KE4899: 9V Alkaline

KE4892: 9V Lithium

Dimensions (HxDia)

38x138mm

Operating Temperature

5°C to 40°C

Sound Output

85dB

Weight

KEKF3: 0.4kg

KEKF3R: 0.4kg

Product Datasheets
FAQs (1)
Q. How can we test the alarm to make sure it is working?
A.

The manufacturer's recommendation is to test the alarm by pressing the test button. This will simulate a heat input at the heat sensor. You can also test it with a hair dryer but make sure that the hairdryer is kept away at a suitable distance from the alarm. Do not attempt to test the alarm by using open fire or excessive heat as this may damage the unit.

Customer Reviews

9 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: 5 / 5 Stars

Reviewed by:

good product quick delivery

Published on: 13th November 2015

Rating: 5 / 5 Stars

Reviewed by:

Direct replacement for the same product that was past it's 10 Year life

Published on: 3rd November 2015

Rating: 4 / 5 Stars

Reviewed by:

Bought to interlink with KF2 smoke alarms and fits the part.

Published on: 5th July 2015

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