How far must the outlets from a fan or air duct used to ventilate refrigerants be from any air intake or exhaust openings in adjoining buildings?

The correct distance that outlets from a fan or air duct used to ventilate refrigerants must be from any air intake or exhaust openings in adjoining buildings is 20 feet. This requirement is based on safety regulations designed to prevent the recirculation of harmful refrigerant gases into other buildings. By maintaining a distance of 20 feet, the likelihood of any refrigerant contaminants entering the air intake systems of adjacent structures is minimized, thereby protecting the air quality and safety of those environments.

This guideline is a crucial component of building and ventilation system design, ensuring that refrigerants are adequately vented without adversely affecting nearby areas. The specified distance helps to establish a safe boundary for the dispersion of potentially harmful substances, thereby reinforcing the integrity of overall HVAC (heating, ventilation, and air conditioning) systems and compliance with health and safety standards.