Issue 4 and Volume 159.

BY FRANK C. MONTAGNA As firefighters, we are supposed to be experts in all things fire, and so the public sometimes asks us fire-related questions, such as the following. DETECTORS “Where should I place my home smoke and carbon monoxide (CO) detectors?” We tell civilians not to place them within four inches of the point where the wall meets the ceiling. Why not? Neither smoke nor carbon monoxide detectors should be placed within four inches of where the wall meets the ceiling because this space is considered dead-air space. Detecting devices placed here may not be exposed to true levels of smoke or CO because the lack of air movement in these spaces may result in false low levels of smoke or CO. The result can be a delayed alarm. When asked where to place these alarms, we should share more information. Smoke and CO detectors are expected to alert…

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