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Mains Powered Smoke Alarms & Heat Alarms with Self-Charging 10 Year Back-up Battery - Kidde Firex KF-R Series

4.6 out of 5 stars
Choose a product To see stock availability
From: £46.79 inc VAT
£38.99 ex VAT
Product Overview

These updated Kidde Firex smoke and heat alarms are mains powered, interlinking units that use up to 70% less energy than previous Firex models. The alarms are hard-wired and fitted with self-charging lithium back-up batteries. They can be interlinked with other units from the same series to create all round fire protection within the home; when one alarm detects fire and sounds, all interlinked units will sound. Installing the right sensor types in your property gives you the fastest possible response time with the minimum number of false alarms.

  • Mains powered with self-charging 10 year lithium back-up battery
  • Up to 70% less energy consumption compared to previous Firex models
  • Suitable for installations complying to BS 5839-6: 2019 Grade D1
  • Kitemarked to BS EN 14604: 2005 and CE marked
  • 6 year warranty
  • Please see our replacement for the KF10 Ionisation model which has been discontinued
  • A maximum of 24 units can be interlinked via signal cable
  • Neat slimline design
  • Sealed lithium battery is trickle-charged from mains power to ensure protection during power cuts
  • 230V hard-wired smoke alarm
  • LED display
  • Test/Hush button
  • Low battery warning chirp can be silenced for 8 hours
  • Supplied with dust cover (to protect unit temporarily if you carry out dusty work)
  • Dimensions (HxDia.): 38x133mm
  • This alarm is also suitable for both the Welsh and Scottish updated 2022 legislation

Please Note: The Kidde Firex models are replacements for the old Kidde Firex units and the Kidde 9HI and 9HILL ranges and 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 KF10R, KF20R and KF30R.

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
KEKF10R
Ionisation Alarm with Rechargeable Lithium Cell
Hard wire interlink
KEKF2
Optical Alarm
Hard wire interlink
KEKF2R
Optical Alarm with Rechargeable Lithium Cell
Hard wire interlink
KEKF3
Heat Alarm
Hard wire interlink
KEKF3R
Heat Alarm with Rechargeable Lithium Cell
Hard wire interlink
KEKF1
Ionisation Alarm
Hard wire interlink
KEKF1R
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

KF20R Optical Smoke Alarm:  KEKF20R

KF30R Heat Alarm:  KEKF30R

Brand Kidde
Back-Up Battery

Longlife Lithium

Dimensions (HxDia)

38 x 133mm

Operating Temperature

0° to +40°C

Relative Humidity

Up to 93% Relative Humidity (RH)

Sound Output

85dB

Weight 0.40kg
Product Datasheets

Pricing & Availability

Model Stock Price
KF20R Optical Smoke Alarm
Product Code: KEKF20R
Stock Level:
More than 20 in stock Expected dispatch: 2nd Apr
Price:

£46.79 inc VAT

£38.99 ex VAT

KF30R Heat Alarm
Product Code: KEKF30R
Stock Level:
16 in stock Expected dispatch: 2nd Apr
Price:

£47.99 inc VAT

£39.99 ex VAT

Delivery Options

The following delivery options are available on this product.

Economy 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

Customer Reviews

11 customers have given this product an overall rating of 4.6 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: M B

Best 10 year mains / integral lithium battery product for the money.

Published on: 2nd August 2022

Rating: 3 / 5 Stars

Reviewed by:

Good device but poor install design Poor design from the manufacture, requires a plasterboard box cut into the ceiling as the socket with only single insulated wiring is at 90degs to the detector. Why did they not build it like all normal system detectors where the base has screw terminals and the detector just clips onto.

Published on: 3rd October 2017

Rating: 5 / 5 Stars

Reviewed by:

Well designed and easy to replace when necessary. They work well, and the test and alarm buttons are now much improved.

Published on: 1st September 2017

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