What is the minimum distance in feet that intake openings must be located below contaminants located within 10 feet?

The minimum distance that intake openings must be located below contaminants within a 10-foot radius is 3 feet. This requirement is in place to ensure that air drawn into a mechanical system is free from potential pollutants or contaminants that could compromise indoor air quality and the overall efficiency of the system. By maintaining this distance, the risk of airborne contaminants entering the intake openings is significantly reduced, creating a healthier environment and enhancing the performance of HVAC systems.

This requirement aligns with established guidelines and best practices aimed at optimizing indoor air quality and preventing issues associated with poor ventilation. Adequate separation from sources of contamination is crucial in mechanical system design, and the 3-foot rule strikes a balance between practical installation considerations and health safety measures.