Image 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
Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck Description Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.
Image Ventilation inlet is not near any exhaust outlets/contamination sources and is at least 2 ft. above the roof deck
Image Ventilation inlet is too close to exhaust outlets and does not extend at least 2 ft. above the roof deck
