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A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts
Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
Door has been undercut to allow for specified amount of air flow therefore contributing to pressure balancing
Door is not undercut therefore not contributing to pressure balancing
Duct to boot connection of jump duct is properly sealed with mastic
Duct to boot connection of jump duct not fastened and sealed
Grill and duct size based on calculated requirements for net free area
Provide for pressure balancing between bedrooms and the rest of the house.
Return box has been properly sealed with mastic
Return box has not been sealed
Return duct has been properly sealed with mastic
Return has not been sealed
Transfer grill not sealed
Transfer grill sealed with mastic