What must be true about mechanical intakes in relation to hazardous sources?

For mechanical intakes, maintaining a safe distance from hazardous sources is crucial to ensure air quality and prevent contamination. The regulation that specifies a horizontal distance of 10 feet from hazardous sources helps to minimize the risk of drawing in pollutants, odors, or any harmful substances that could compromise indoor air quality. This distance is based on safety guidelines designed to protect occupants and ensure that the air being introduced into the HVAC system is clean and suitable for circulation.

By adhering to this distance, the likelihood of ingesting exhaust gases or airborne contaminants emitted from vehicles, industrial activities, or even nearby equipment is significantly reduced. Consequently, positioning mechanical intakes at least 10 feet away serves as a preventive measure in designing HVAC systems, aligning with safety standards and ensuring optimal performance.