Attic Heat Detector Placement

Ceiling mounted detectors should be located such that their sensitive elements are between 25mm and 150mm below the ceiling in the case of heat detectors or between 25mm and 600mm below the ceiling in the case of smoke detectors.

Attic heat detector placement.

5 measure and mark a distance of 4 inches on the ceiling from each wall. Page 1 of 2 heat detectors in an attic. Be fixed where they can be reached to maintain therefore not over the stairs. Ceiling height construction and ventilation play significant roles in detector performance and must be considered when determining detector placement.

The kidde firex hd135f is a 120 volt ac the kidde firex hd135f is a 120 volt ac wire in heat alarm that responds to temperature rather than smoke. They feature a detecting component inside the unit that activates an alarm when it reaches a predetermined temperature. Spot type heat detectors should be selected so that the rating is at least 20 f 11 c above maximum expected ceiling temperature. Nfpa 72 chapter 5 initiating devices heat detectors.

Smoke alarms are not designed for garages and attics and are much more likely to fail than a heat detector. All i have a relatively large attic that covers about 1600 sq ft of my house. Another location in a home where you should have a heat detector rather than a smoke alarm is the attic. Heat detectors represent fairly old technology and the first residential fire alarms were of this type.

When you find yourself doing a layout for spot type heat detectors in an area that isn t square or rectangular don t forget 17 6 3 1 2 provides you with some options. Heat detectors are sufficient for places where speed of detection isn t critical or in small confined spaces. E hd fixed temperature rate of rise heat detector. Regardless of where you place a heat detector these devices should be placed away from any vents or ducts that may interfere with their function.

It gets very hot up there in the summer southern california so i thought it would be prudent to install a few high temperature heat sensors i bought 3 194 degree heat detectors. Nfpa 72 17 6 3 1 2 does what it can to make heat detector layout in irregularly shaped areas less complicated. The interconnect system must not exceed the nfpa national fire protection association limit of 18 initiating devices smoke heat co etc. The alarm will sound if temperatures rise above 135 f.

Heat detectors are also recommended for rooms where indoor smoking is an approved activity by the owner. This is a continuation on the series of articles about the most important requirements in nfpa 72 national fire alarm code book. The kidde hd135 f is inter connectable. Install the first attic smoke detector on the wall near the stairs anywhere between the 4 inch and 12 inch marks.

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