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Kidde Firex KF30 review

£29.00 Typical price

Test resultShow Context

Key features
  • Heat alarm
  • Mains only
  • Heat alarm
Expert review

The Kidde Firex KF30 is a mains-powered linkable heat alarm that detects and sounds when temperatures rise. It’s designed for places such as the kitchen or a garage, where smoke from cooking or fumes from a vehicle could cause false alarms with traditional smoke alarms. In case of mains failure it comes with a 10-year sealed battery back-up. It’s a linkable model that can be paired with the following Kidde Firex smoke alarms: KF20, KF20R, KF30, KF10, KF10R, KF2, KF2R, KF3, KF3R, KF1 and KF1R. This makes it suitable for homes in Scotland when the heat and smoke alarms law changes in 2022. It comes with a six-year guarantee. But is it any good at detecting rises in temperature? To find out, we tested it in the lab. Read on for our full review of this Kidde Firex heat alarm.

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Last checked by Which?

November 2021

First reviewed by Which?

November 2021

Released

July 2017

Test results

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

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Best Buys and Don't Buys
We have tested 38 smoke alarms and found that there are 9 Don't Buys and 8 Best Buys.
Range of Smoke alarm scores
  1. 0%
    Lowest score
  2. 38%
    Average score
  3. 93%
    Highest score
We'll show you where this model sits on the scale so that you can see how it compares to smoke alarms we've tested
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Put us to the test

Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

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