When Should You Use a Heat Detector Instead of a Smoke Detector?

Smoke detectors are the default, but there are places they will not survive or will nuisance-alarm constantly. That is where heat detectors are the right call.

Where heat detectors belong

Use heat detectors where smoke detection is impractical — kitchens, mechanical rooms, parking garages, and attics. These are environments with dust, fumes, temperature swings, or exhaust that would trip or foul a smoke head.

Rate-of-rise vs. fixed-temperature

Heat detectors come in two response types. Rate-of-rise heads respond to a fast climb in temperature; fixed-temperature heads trip at a set point. Many devices combine both. Which one you use depends on the space and how quickly ambient temperature can legitimately change there.

Stock heat detectors

We stock both rate-of-rise and fixed-temperature commercial heat detectors from Simplex, Notifier, Edwards EST, and System Sensor. Swapping a head? Make sure the base matches too — and see the most common fire alarm inspection failures before your next inspection.