How We Test Smoke Alarms - Which?

To uncover the Best Buy smoke alarms that you can trust, we put every smoke alarm we review to the test against four different types of fire. And for heat alarms - which detect rapid temperature rises - we run five heat detection tests to check how well they work.
Which? tests smoke alarms to find which alarms will alert your family to every type of house fire, and which smoke alarms you can't trust to keep you safe.

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