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The Kidde 2SFW mains-powered optical smoke alarm can be fitted as a standalone alarm or used as part of a wireless network of alarms. This means that it will be suitable for homes in Scotland after the alarms law changes there in 2022. There are two buttons, one to test it – we recommend you do this weekly – and a 'hush' button to silence it after sounding. A 9V battery will provide back-up power if there’s a power cut. And it comes with a warranty from the manufacturer covering its six-year lifetime. But what’s it like at detecting smoke and sounding the alarm? We tested it to find out. Read on to learn about how this Kidde mains-powered smoke alarm fared in our tough lab tests.
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Cotton fires | |
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- Dec 2021Last checked by Which?
- May 2019First reviewed by Which?
- Jun 2018Released