Showing results 1 - 23 of 23
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Buried ducts are laid on the floor of a vented attic then covered with spray foam and blown attic floor insulation
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Install wood framing cross pieces in the attic rafter bays on each side of the duct chase
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Right - Open-cell polyurethane spray foam to R-28 on underside of roof turns new attic into conditioned space for HVAC.
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Right- This flue pipe has been air sealed with sheet metal and fire-rated caulk and an insulation dam has been constructed to keep insulation from touching the hot flue pipe
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Right: Ducts are completely buried beneath insulation to the depth specified in the plans
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Right: ductwork is fully encapsulated with ccSPF prior to ceiling installation and burial
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Right: Ductwork is installed in direct contact with lower truss cords. In this picture the main trunk is laying on the truss cords and branch ducts are temporarily held with strapping across truss cords. Ducts are well sealed with mastic
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Spray foam insulation used for raised ceiling duct chase
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The attic duct chase insulated and sealed to the attic floor with spray foam
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Wrong: Ducts are held above the ceiling plane with strapping to provide a good angle into top-entry boots. Once the ceiling insulation is added, this duct will protrude from the ceiling insulation and will not be buried
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Wrong: Ducts are held from the rafters with strapping and a large beam prevents ducts from properly lying on the ceiling plane
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Wrong: Ducts are not laid across the lower truss cords or ceiling, but are hung from the rafters by straps. As a result, ductwork is not buried
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Wrong: Ductwork is not fully encapsulated with ccSPF insulation. The duct jacket is still fully visible at sections of the duct