How far must spot type smoke detectors be located from air diffusers?

The requirement for the placement of spot type smoke detectors in relation to air diffusers is crucial for ensuring their effective operation. Detecting smoke accurately can be hindered by the airflow from air diffusers, which can disperse smoke particles and potentially delay or prevent the detector from activating in response to a fire.

The standard distance to maintain is 36 inches from air diffusers. This ensures that the smoke detector operates in a stable air environment without interference from the airflow, allowing it to function properly when needed. Adhering to this guideline helps maintain the safety and reliability of the smoke detection system within a facility. Other distances provided in the choices do not align with this standard, which is why placing a smoke detector at 36 inches from an air diffuser is the correct practice.