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Ventilation air inlets ≥ 2 ft. above grade or roof deck in Climate Zones 1-3 or ≥ 4 ft. above grade or roof deck in Climate Zones 4-8 and not obstructed

Ventilation inlet does not terminate high enough above the roof deck

Ventilation inlet is not near any exhaust outlets/contamination sources and is at least 2 ft. above the roof deck

Ventilation inlet is too close to exhaust outlets and does not extend at least 2 ft. above the roof deck

Ventilation Air Inlet Locations

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

Home Performance Assessment

Information guide describing how to apply a whole-house approach to home improvement with energy efficiency upgrades, improved indoor air quality, and increased comfort.

Attic Ventilation Fans

Guide describing the use of attic ventilation fans to mechanically pull outside air through the attic in an attempt to cool the attic, control moisture, and prevent ice dams.

Pre-Retrofit Assessment of Existing HVAC Systems

Information guide describing considerations for before retrofitting HVAC systems, retrofit scope considerations, and HVAC system replacement options.