Mains Powered Optical Smoke Alarm with Back-Up Battery - Kidde Firex KF20

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£21.00 inc VAT
£17.50 ex VAT
Product Overview

The Kidde Firex KF20 and KF20R alarms are a pair of mains powered optical smoke alarms that use up to 70% less energy than their predecessors and are capable of hardwire interlinking with up to 24 other compatible units. The KF20 is fitted with a replaceable alkaline back-up whilst the KF20R is fitted with a rechargeable lithium battery which is designed to last the life of the alarm.

  • 230V mains powered optical smoke alarm
  • Optional alkaline or rechargeable lithium back-up battery versions
  • Up to 70% less energy consumption compared to previous Firex models
  • 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: 2019 Grade D1 (lithium) or Grade D2 (alkaline)
  • 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


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.

Interlink

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
KEKF20
Optical Alarm
Hard wire interlink
KEKF20R
Optical Alarm with Rechargeable Lithium Cell
Hard wire interlink
KEKF30
Heat Alarm
Hard wire interlink
KEKF30R
Heat Alarm with Rechargeable Lithium Cell
Hard wire interlink
KEKF10
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
KE4MCO
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

Kidde KF20 - Alkaline Battery Backup:  KEKF20-FAP

Kidde KF20R - Rechargeable Lithium Battery Backup:  KEKF20R-FAP

Brand Kidde
Back-Up Battery

KF20: 9V Alkaline

KF20R: Longlife Lithium

Dimensions (HxDia)

39x133mm

Operating Temperature

0° to +40°C

Sound Output

85dB

Weight 0.28kg
Product Datasheets

Pricing & Availability

Model Stock Price
Kidde KF20 - Alkaline Battery Backup
Product Code: KEKF20-FAP
Stock Level:
More than 20 in stock Expected dispatch: Today
Price:

£23.99 inc VAT

£19.99 ex VAT

Kidde KF20R - Rechargeable Lithium Battery Backup
Product Code: KEKF20R-FAP
Stock Level:
More than 20 in stock Expected dispatch: Today
Price:

£39.59 inc VAT

£32.99 ex VAT

Delivery Options

The following delivery options are available on this product.

Standard 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

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