Showing results 1 - 11 of 11
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A floor cavity between the first and second floor can provide a conditioned space for HVAC ducts if the rim joists are insulated and air sealed, if sufficient space is available, and if open-web floor joists are used
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Right - All seams in the HVAC equipment and ductwork are sealed with mastic; because the HVAC equipment is in the garage, it is an air-sealed closet.
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The chase is laid out on the plans (grey highlighted areas) to aid sub-contractors to execute the design
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The drywall above the chase extends beyond adjoining top plates for a continuous air barrier
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The drywall above the dropped ceiling duct chase extends beyond adjoining top plates for a continuous air barrier
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Thermal and air barriers at rim joist or new blocking prevent Infiltration of unconditioned air into the floor cavity
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Uninsulated, unsealed, or missing rim joists allow attic air and heat into the floor cavity
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Unsealed, uninsulated rim joists allow outside air and heat into the floor cavity
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Wrong: Drywall does not extend beyond the top plate of the interior walls. This installation has the potential for leakage at the sides where the ducts penetrate the side walls of the chase