When placing spot type smoke detectors, what maximum distance should be used as a guide?

The maximum distance of 30 feet is the standard guideline for placing spot type smoke detectors. This distance allows for adequate coverage in a room while ensuring detectors can effectively sense smoke from a variety of fire sources. It's important for smoke detectors to be positioned strategically to detect smoke quickly, as smoke rises and spreads, and having them within this guideline enhances their efficiency and performance.

Placement beyond this distance could result in delayed detection, which could have serious safety implications. The 30-foot guideline helps to ensure that detectors can respond promptly to smoke, thereby providing earlier warnings that are crucial for life safety and property protection in the event of a fire.