Kidde Firex 4973 Optical Smoke Alarm KF2
Basket (0) Checkout
FREEPHONE 0800 612 6537 Now FREE from UK mobiles

Mains Powered Optical Smoke Alarm with Back-up Battery - Kidde Firex KF2

Discontinued Product

This product has been discontinued and is no longer available to buy.

View Alternative Product
Product Overview
Kidde Firex KF2 and KF2R's are mains powered, interlinking optical smoke alarms. The KF2 has an alkaline battery back-up and the KF2R, a rechargeable lithium battery back-up.  The units are hard wired and can be interlinked with other units from the series to create all round fire protection within the home.
  • 230V mains powered optical smoke alarm
  • Optional alkaline or rechargeable lithium back-up battery versions
  • 6 year warranty
  • A maximum of 24 units can be interlinked via signal cable
  • Kitemarked to BS EN 14604:2005 - view the certificate
  • Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
  • CE marked
  • LED indicator
  • Test / Hush button
  • Low battery warning chirp
  • Supplied with dust cover (to protect unit temporarily if you carry out dusty work)

Please Note: The Kidde Firex KF2 (previously Kidde 4973) and KF2R (previously Kidde 4985) are replacements for the Kidde 2239HI and 2239HILLs and can still 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 KF2 and KF2R.

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 Datasheets

The following datasheets are available for this product.

Customer Reviews

19 customers have rated this product and it has an overall rating of 4.6 out of 5

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

5 / 5 Stars

Reviewed by: -

NO MORE ANNOYING ALARMS FROM KITCHEN SMELLS CUSTOMER SERVICE RECOMMENDED THIS OPTICAL ALARM FOR MY HALL, AS PREVIOUS ALARM AWAYS GOING OFF WITH COOKING SMELLS FROM KITCHEN.EXCELLENT ADVICE, THANK YOU

Published on: 25th September 2015

4 / 5 Stars

Reviewed by: -

Good replacement to date

Published on: 25th September 2015

4 / 5 Stars

Reviewed by: -

Good quality, easy to use slightly expensive

Published on: 26th June 2015

5 / 5 Stars

Reviewed by: -

Perfect replacement for two out of date smoke alarms

Published on: 5th January 2015

5 / 5 Stars

Reviewed by: -

Works well, keeps us safe Part of a pair. We replaced an old set of these with new. The old and the new are the same size so easy to fit in which is a benefit. The old system worked well with few false alarms and the only alarms were when you would expect it. Luckily we've had no fires so it hasn't been tested in anger, but when the plumber was soldering that set it off so seems to work!

Published on: 13th December 2014

4 / 5 Stars

Reviewed by: -

As for KF1

Published on: 31st October 2014

4 / 5 Stars

Reviewed by: -

Reliable and discreet and peace of mind.

Published on: 8th October 2014

4 / 5 Stars

Reviewed by: -

It's alarmingly good!

Published on: 20th May 2014

5 / 5 Stars

Reviewed by: -

Sales lady knew all about the the Smoke alarm and delivery was first class.Product excellent.

Published on: 18th February 2014

5 / 5 Stars

Reviewed by: -

Very good product and service. Would recommend this company.

Published on: 22nd January 2014

5 / 5 Stars

Reviewed by: -

Excellent product highly recommended.

Published on: 29th November 2013

4 / 5 Stars

Reviewed by: -

Straight forward to fit in old housing

Published on: 24th September 2013

5 / 5 Stars

Reviewed by: -

Aquality product, reasonably priced and easy to install

Published on: 12th August 2013

5 / 5 Stars

Reviewed by: -

simple replacement instalation,works well no problems.

Published on: 11th May 2013

5 / 5 Stars

Reviewed by: -

Published on: 31st December 2012

5 / 5 Stars

Reviewed by: -

Published on: 13th September 2012

5 / 5 Stars

Reviewed by: -

Excellent product and does not go off when cooking like the old alarm did. Very easy to replace old alarm.

Published on: 19th February 2012

4 / 5 Stars

Reviewed by: -

Published on: 10th February 2012

5 / 5 Stars

Reviewed by: -

Published on: 24th November 2011

Customer didn't leave a rating

Reviewed by: -

Excellent product,excellent instructions enclosed.

Published on: 20th September 2010

Show All

Kidde 4973 smoke alarm battery replacement

Play Video
Run Time: 01:42

Looking for more information?

If you have any questions or would like more information about this product you can ask one of our specialists.

Direct Telephone 01507 464181
Direct Email Email Now

Cookies

Close

This site uses cookies to improve your experience and for essential functioning of the site. By continuing to use our site you agree to the use of cookies.

Change your cookie settings at any time by clicking on the button at the bottom of each page. Read more about the cookies we use in our Privacy Policy.

By continuing to browse this site you agree to the use of cookies. Learn more.