Smoke detectors must not be installed directly in the airflow of which item?

Smoke detectors play a critical role in fire safety by detecting the presence of smoke, but their effectiveness can be compromised if they are improperly positioned. When installing smoke detectors, it is crucial to avoid placing them directly in the airflow of supply registers.

Supply registers are part of a heating or cooling system and are designed to distribute air throughout a space. If a smoke detector is installed too close to a supply register, the airflow can prevent smoke from reaching the detector quickly. This could lead to delayed detection in the event of a fire, creating a serious safety hazard. Effective smoke detection relies on the ability to sense smoke particles in the air, and any obstruction or alteration to that airflow caused by the heating or cooling systems can significantly decrease the response time of the alarm.

Understanding the airflow dynamics in a space is vital for ensuring that smoke detectors are placed in locations where they can function optimally and provide maximum safety. Other items like return vents, exhaust fans, or air conditioning units might also influence airflow, but it is the supply registers that are particularly critical to avoid in this context for proper smoke detection.