Smoke detectors are great for detecting smoke, but heat detectors are much more sensitive to temperature. This means that when the heat detector comes into contact with smoke, it will not go off unless it reaches a certain heat level.
So where should you install your heat detector?
The rule of thumb is to place these detectors in areas where smoke detectors are not appropriate and in a spot that is not generally changing from a cool to hot temperature. Humidity also might reduce the effectiveness of the heat detector, so don’t place it in washrooms or near washing machines.
Please note – A heat detector should not replace smoke detectors in bedrooms or in the hallway outside of the bedrooms. You should test your heat detector(s) every 3 months or every time you test the smoke detectors in your home.