Guides A-Z

Guide describing how to upgrade or expand an existing HVAC system.

No outdoor air intakes connected to return side of the HVAC system, unless controls are installed to operate intermittently & automatically based on a timer and to restrict intake when not in use (e.g., motorized damper)

Guide describing how to install ventilation air inlets in open locations at a safe distance from potential air contamination sources.

This guide describes how to install a whole-building ventilation system to provide adequate dilution of indoor air contaminants.