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

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.