Heat Detector

A heat detector raises the alarm when the air around it gets hot, not when it fills with smoke. Cooking steam, boiler exhaust and vehicle fumes look like smoke to an optical detector but do not heat the air to fire levels, so heat detectors stay quiet until there is a real fire.

Two types are common. A fixed-temperature detector operates when the air reaches a set value. The electrically connected model described here operates at 58°C, and other ratings suit hotter rooms. A rate-of-rise detector reacts to a fast climb of about 12 to 15°F (6.7 to 8.3°C), so it responds sooner to a growing fire. Many heads combine both and report to your fire alarm panel.

These are the places where we normally recommend heat detection:

Kitchens and plant rooms vary a lot, so we start by looking at them. The job includes:

A head rated too low alarms on a hot afternoon, and one rated too high responds late. A common rule is to choose a rating at least 11°C above the highest temperature the room normally reaches, so we ask for the normal peak temperature of each room. Where temperatures swing, near ovens and generator exhausts, we choose fixed-temperature heads. Where a room stays steady, rate-of-rise heads respond faster.

In kitchens we keep heads clear of the cooking hob and the extract hood, where direct blasts of heat would cause false alarms. Pair them with smoke detectors in the offices and corridors around, or with multi-sensor detectors where you want both signals.

Builders and architects should show kitchens, plant rooms and car parks on the detector schedule early, because these rooms need heat detection, not smoke. Industries use heat detectors in boiler houses, generator rooms and dusty sheds. Commercial building owners fit them in canteens and basements. Hospital owners fit them in kitchens, laundries and generator rooms, so steam and fumes do not set off alarms across a ward block. MEP consultants can pass us the kitchen, plant and DG room schedules for a rated heat head layout. Corporates use them in cafeterias and pantries. Defence establishments, including Navy and Army sites, use them in mess kitchens, boiler houses and generator rooms, and we quote within their security and vendor rules.

A heat detector covers a smaller floor area than a smoke detector, so the same room needs more heads. The total depends on four things:

Share these through our quote page or on WhatsApp:

Restaurant and hotel kitchens, generator rooms and basement car parks are the typical jobs in Hyderabad, in areas such as Banjara Hills, Jubilee Hills and Hitech City. In Visakhapatnam the same room types appear in Dwaraka Nagar, MVP Colony and Madhurawada, along with workshops and sheds near Gajuwaka. We also supply temperature sensors, thermal sensors and fire alarm circuits. Contact the nearest office to book a visit.