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.
- Power: Mains powered with battery backup
- Backup Battery: 9V alkaline or self-charging longlife lithium backup options
- Warranty: 6 year warranty
- Up to 70% less energy consumption compared to previous Firex models
- 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 Grade D1 (KF20R) or Grade D2 (KF20)
- CE marked
- LED indicator
- 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)
- Supplied with fixings; 2 x screws and 2 x rawl plugs
- This alarm is also suitable for the updated 2022 Scottish legislation for fire alarms in homes
Please Note: The Kidde Firex KF20 (previously Kidde 4973 / KF2) and KF20R (previously Kidde 4985 / KF2R) 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.
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
|