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A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts

A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts
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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
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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
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Door has been undercut to allow for specified amount of air flow therefore contributing to pressure balancing

Door has been undercut to allow for specified amount of air flow therefore contributing to pressure balancing
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Door is not undercut therefore not contributing to pressure balancing

Door is not undercut therefore not contributing to pressure balancing
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Duct to boot connection of jump duct is properly sealed with mastic

Duct to boot connection of jump duct is properly sealed with mastic
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Duct to boot connection of jump duct not fastened and sealed

Duct to boot connection of jump duct not fastened and sealed
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Extreme weather, such as wind, fire, flood, or extreme heat (included in the Severe Weather category above) causes most large electric disturbance events in the U.S (defined as affecting at least 50,000 customers) (data from 2000-2016)

Extreme weather, such as wind, fire, flood, or extreme heat (included in the Severe Weather category above) causes most large electric disturbance events in the U.S (defined as affecting at least 50,000 customers) (data from 2000-2016)
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Grill and duct size based on calculated requirements for net free area

Grill and duct size based on calculated requirements for net free area
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Provide for pressure balancing between bedrooms and the rest of the house.

Provide for pressure balancing between bedrooms and the rest of the house.
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Return box has been properly sealed with mastic

Return box has been properly sealed with mastic
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Return box has not been sealed

Return box has not been sealed
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Return duct has been properly sealed with mastic

Return duct has been properly sealed with mastic
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Return has not been sealed

Return has not been sealed
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Right - Skylights provide natural light while maintaining privacy in a narrow second-story bedroom.

Right - Skylights provide natural light while maintaining privacy in a narrow second-story bedroom.
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Right – A transfer grille is installed high on a bedroom wall in a new-construction home

Right – A transfer grille is installed high on a bedroom wall in a new-construction home
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Right – Transfer grilles are installed over doorways to bedrooms in a new-construction home

Right – Transfer grilles are installed over doorways to bedrooms in a new-construction home
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Right – Transfer grilles, Jump ducts, and wall grilles provide passive returns for air returning from bedrooms to the central HVAC system

Right – Transfer grilles, Jump ducts, and wall grilles provide passive returns for air returning from bedrooms to the central HVAC system
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This home’s exterior walls include Larsen trusses, 9-inch I-joists attached through exterior sheathing to wall studs creating a 9-inch wall cavity that was filled with blown insulation and forms extra deep windowsills.

This home’s exterior walls include Larsen trusses, 9-inch I-joists attached through exterior sheathing to wall studs creating a 9-inch wall cavity that was filled with blown insulation and forms extra deep windowsills.
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Transfer grill sealed with mastic

Transfer grill sealed with mastic
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Transfer grille not sealed

Transfer grille not sealed
Video:

Transfer Grilles (1)

Video:

Transfer Grilles (2)