Which of the following is not a required spacing consideration when installing ember detectors?

• A. Flame Size
• B. Distance from Obstructions
• C. Ceiling Height
• D. Isolations from Walls

Answer: (A)

When placing ember detectors, you want the sensing field to be clear and able to intercept embers carried by air and convection. The spacing you plan should ensure there are no obstructions between the ember source and the detector, the detector sits at a height where rising or drifting embers are likely to reach it, and there’s adequate clearance from walls so corners or edges don’t shield embers from being detected. These factors—distance from obstructions, ceiling height, and isolation from walls—shape effective coverage.

Flame size doesn’t drive spacing requirements for ember detectors. The detector’s job is to sense embers in the air, not to respond to a flame’s size, so the placement and spacing aren’t adjusted based on how large a flame might be.