What is the maximum distance between heat detectors?

What is the maximum distance between heat detectors?

Heat detectors also have similar spacing requirements but these are different to smoke detectors. According to BS 5839, for any general area the spacing between any point in a protected area and the detector nearest to that point should not exceed 7.5m for smoke detectors and 5.3m for heat detectors (fig 4).

How is heat test spacing calculated?

When spacing spot type heat detectors, a joist is defined as any solid member extending 4 in. (10 cm) or more down from the ceiling and spaced less than 3 ft. (1 m) apart. The spacing of heat detectors must be reduced by 50% in the direction perpendicular to the joist.

What are two of the major requirements for detector placement according to NFPA 72 in residential occupancies?

Install smoke alarms inside each bedroom, outside each sleeping area and on every level of the home, including the basement. On levels without bedrooms, install alarms in the living room (or den or family room) or near the stairway to the upper level, or in both locations.

Can I put smoke detector in bathroom?

Smoke alarms should not be installed in a bathroom because the steam from a hot shower or bath will often trigger the alarm. The moisture can also damage the alarm over time and cause it to fail. Any smoke alarm that is within 20 feet of a bathroom should be the photoelectric type.

Can humidity set off a smoke detector?

It has been insufferable lately— hot and sticky enough to set off smoke alarms. Smoke detector manufacturers estimate these false alarms can happen once humidity reaches 85 percent, but according to Silage, weak batteries can increase the chance of false alarm. …

Can Steam from a shower set off a smoke detector?

Steam — Again, because steam from the shower or cooked food can set off a smoke detector, you shouldn’t install one in or just outside of the bathroom or cooking area. You’ll need to air out the area and reset the device. Humidity – The density from the moisture in the air can trigger a false alarm.

Can steam trigger smoke detectors?

Photoelectric smoke detectors have a small light inside. This means that anything that can float into your smoke detector, like vapor, steam, smoke and large puffs of dust, can trigger your smoke detector. This is why it may go off when your cooking, even if you’re not burning anything.