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Ductwork located in a vented attic is subject to high attic temperatures and significant heat gain through the walls of the ducts
Open-web floor joists provide space for ducts between the floors of a two-story home.
Right - Open-cell polyurethane spray foam to R-28 on underside of roof turns new attic into conditioned space for HVAC.
The attic is sealed and insulated along the underside of the roof deck with 5.5 inches of polyurethane spray foam, providing conditioned space for the HVAC system.