The updated Kidde Firex KF20 and KF20R alarms are mains powered, interlinking optical smoke alarms that use up to 70% less energy than previous Firex models. The KF20 has an alkaline battery back-up and the KF20R, a self-charging 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.
Please note: The Kidde Firex KF20 (previously KF2 / 4973 / PADC240) and KF20R (previously KF2R / 4985 / PAR230) are replacements for the Kidde 223/9HI and 223/9HILL series, and can be electrically interlinked. However, the new models cannot be used on the old base plates for the 223/9HI and 223/9HILL series as they use different style connector blocks. This means that base plates must be swapped over on those stated models and connectors need to be replaced.
The table below shows all the units that can interlink with the KF20 and KF20R.
Alarms from the same series
Model Number
|
Type of unit
|
Type of interlink
|
Optical Alarm |
Hard wire interlink
|
|
Optical Alarm with Self-Charging Lithium Cell |
Hard wire interlink
|
|
Heat Alarm |
Hard wire interlink
|
|
Heat Alarm with Self-Charging Lithium Cell |
Hard wire interlink
|
|
Ionisation Alarm |
Hard wire interlink
|
|
Ionisation Alarm with Self-Charging Lithium Cell |
Hard wire interlink
|
|
KEKF2
|
Optical Alarm |
Hard wire interlink
|
KEKF2R
|
Optical Alarm with Self-Charging Lithium Cell |
Hard wire interlink
|
KEKF3
|
Heat Alarm |
Hard wire interlink
|
KEKF3R
|
Heat Alarm with Self-Charging Lithium Cell |
Hard wire interlink
|
KEKF1
|
Ionisation Alarm |
Hard wire interlink
|
KEKF1R
|
Ionisation Alarm with Self-Charging Lithium Cell |
Hard wire interlink
|
Carbon Monoxide Alarms
Model Number
|
Type of unit
|
Type of interlink
|
CO Detector with Self-Charging 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
|
Product Code |
|
||||
---|---|---|---|---|---|
Brand | Kidde | ||||
Back-Up Battery | KF20: 9V Alkaline KF20R: Self-Charging Lithium |
||||
Dimensions (HxDia) | 39x133mm |
||||
Operating Temperature | 0°C to +40°C |
||||
Relative Humidity | Up to 93% |
||||
Sound Output | 85dB |
||||
Warranty | 6 Years |
||||
Weight | 0.28kg | ||||
Product Datasheets |
Model | Stock | Price |
---|---|---|
Kidde KF20 - Alkaline Battery Backup Product Code: KEKF20 |
Stock Level:
More than 20 in stock Expected dispatch: Today
|
Price:
£23.99 inc VAT £19.99 ex VAT |
Kidde KF20R - Self-Charging Lithium Battery Backup Product Code: KEKF20R |
Stock Level:
More than 20 in stock Expected dispatch: Today
|
Price:
£39.59 inc VAT £32.99 ex VAT |
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19 customers have given this product an overall rating of 4.6 out of 5
Rating: 5 / 5 Stars
Reviewed by: K F
Exactly replaced the alarm that had expired easily fitted the base fittngs without any hassle
Published on: 24th December 2021
Rating: 5 / 5 Stars
Reviewed by: M L
Atractive design and easy to fit
Published on: 4th December 2021
Rating: 5 / 5 Stars
Reviewed by: M W
Good very loud alarms. The only negative was that I had to purchase the ceiling base plate as a separate item, it would have been useful if this had been included as my electrician had to make a special journey to get one, luckily he did or it would have meant a second visit to fit and more costs to me. Perhaps your staff should point this out at the point of sale.
Published on: 17th September 2021
Rating: 4 / 5 Stars
Reviewed by: P C
Works ok.
Published on: 15th August 2021
Rating: 5 / 5 Stars
Reviewed by:
Brilliant!! I forgot about the rice boiling on the stove. Alarm went off leaving me to clean off burnt on rice. Good I had this product.
Published on: 13th April 2018
Rating: 5 / 5 Stars
Reviewed by:
Good value product
Published on: 6th November 2017
Rating: 4 / 5 Stars
Reviewed by:
Replaced older model that had been very reliable. Hopefully this will be as reliable as the older version it replaced. Seems to be working as expected.
Published on: 20th August 2017
Rating: 4 / 5 Stars
Reviewed by:
Easy to fit, looks good Plug connector makes installation a little bit fiddly
Published on: 21st May 2017
Rating: 5 / 5 Stars
Reviewed by:
Good service, as always
Published on: 7th February 2017
Rating: 5 / 5 Stars
Reviewed by:
Easy to install, works perfectly.
Published on: 28th December 2016
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