Where should heat detectors be installed in a room with a peaked ceiling?

The correct choice emphasizes that heat detectors should be installed within 3 feet of the peak of a room with a peaked ceiling. This is due to the way heat rises; it gathers near the top of a room, particularly in spaces with sloped ceilings. Installing detectors too low, such as at floor level or along the outer walls, would delay the response time of the detector when a fire occurs because rising heat would not be detected promptly.

By placing the detectors near the peak, they can more effectively sense an increase in temperature indicative of a fire, ensuring a quicker response from the alarm system. This location maximizes the effectiveness of the heat detectors in detecting potentially hazardous conditions early and alerting occupants or monitoring systems to take action.