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Kidde Firex Mains Powered Smoke Alarms with Alkaline Back-up Battery KF Series

25 Customer Reviews
From: £17.75 inc VAT
£14.79 ex VAT
Product Overview

The updated Kidde Firex range of smoke and heat alarms are mains powered, interlinking units that now use up to 70% less energy than previous Firex models. Hard-wired with alkaline back-up batteries, these alarms can be interlinked with other units from the series to create all round fire protection within the home; when one alarm detects smoke/heat and sounds, all 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 alkaline back-up battery
  • Suitable for installations complying to BS 5839-6: 2019 Grade D2
  • Kitemarked to BS EN 14604: 2005 and CE marked
  • 6 year warranty
  • A maximum of 24 units can be interlinked via signal cable
  • Neat slimline design
  • 230V hard-wired smoke alarm
  • Up 70% less energy consumption compared to previous Firex models
  • 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

Please Note: The Kidde KF Firex models are replacements for the older Firex 4000 series, Kidde 9HI and Kidde 9HILLs 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 KF10, KF20 and KF30.

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
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

Technical Data

This is the technical data for the Kidde Firex Mains Powered Smoke Alarms with Alkaline Back-up Battery KF Series.

Product Code
KF10 Ionisation Smoke Alarm KEKF10
KF20 Optical Smoke Alarm KEKF20
KF30 Heat Alarm KEKF30
Weight 0.40kg
Dimensions (HxDia) 39x133mm
Sound Output 85dB
Operating Temperature 0° to +40°C
Back-Up Battery 9V Alkaline
Relative Humidity Up to 93% Relative Humidity (RH)

Product Datasheets

The following datasheets are available for this product.

Pricing & Availability

Model Stock Price
KF10 Ionisation Smoke Alarm
Product Code: KEKF10
Stock Level:
More than 20 in stock Expected dispatch: 17th Aug
Price:

£17.75 inc VAT

£14.79 ex VAT

KF20 Optical Smoke Alarm
Product Code: KEKF20
Stock Level:
More than 20 in stock Expected dispatch: 17th Aug
Price:

£23.99 inc VAT

£19.99 ex VAT

KF30 Heat Alarm
Product Code: KEKF30
Stock Level:
More than 20 in stock Expected dispatch: 17th Aug
Price:

£28.79 inc VAT

£23.99 ex VAT

Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.79 inc VAT - Orders will be delivered in 3-5 working days by Hermes

Express Delivery

£7.91 inc VAT - Orders will be delivered in 1-2 working days by Hermes

Customer Reviews

25 customers have have given this product an overall rating of 4.8 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: B P

An excellent product at a competitive price

Published on: 11th July 2018

Rating: 5 / 5 Stars

Reviewed by: A I

Easy to fit, good value Replacing existing alarms. These are compact and easy to fit. Good customer service too.

Published on: 27th May 2018

Rating: 5 / 5 Stars

Reviewed by: N H

These alarms are replacements for existing Firex alarms and were just a simple matter of replacing plug-and-play items. Five minutes, and they were both done. Easy peasy.

Published on: 27th May 2018

Rating: 5 / 5 Stars

Reviewed by: G L

Very informative company & products

Published on: 12th May 2018

Rating: 4 / 5 Stars

Reviewed by: I S

Easy to fit replacement

Published on: 5th November 2017

Rating: 4 / 5 Stars

Reviewed by: R C

very good to install and working well

Published on: 16th October 2017

Rating: 4 / 5 Stars

Reviewed by: D S

Good product.

Published on: 15th August 2017

Rating: 5 / 5 Stars

Reviewed by: K M

easy to install Replaced older alarms that had discoloured with age

Published on: 19th March 2017

Rating: 5 / 5 Stars

Reviewed by: H C

Easily fitted and working perfectly

Published on: 14th March 2017

Rating: 5 / 5 Stars

Reviewed by: P W

Great product excellent service

Published on: 15th December 2016

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