Showing results 51 - 100 of 422
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Consider using a metal duct elbow instead of flex duct at boot connections to prevent compressions
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Coordinate with other trades including framers, plumbers, and electricians to prevent needless looping of flex duct
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Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
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Cut-away view showing unsealed gaps around a heating duct that goes through a wall
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Door has been undercut to allow for specified amount of air flow therefore contributing to pressure balancing
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Drywall is installed before framing in dropped soffits to provide an air barrier above these duct chases.
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Duct boot is air sealed to ceiling by covering the seam with fiberglass mesh tape and mastic
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Duct boots sealed to floor, wall, or ceiling using caulk, foam, mastic tape, or mastic paste
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Duct lacks adequate support to carry the weight so the few straps are pinching the duct
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Duct to boot connection of jump duct not fastened and sealed
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Duct/pipe penetration with metal cap flashing and wood blocking for trim attachment
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Ducts are insulated but strapping is compressing the insulation therefore reducing the R-value
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Ducts running parallel to trusses have limited width due to truss spacing
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Ducts sagging because supports not installed at regular intervals
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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
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Electronically controlled dampers allow this central air system to provide zoned heating and cooling to specific parts of the home.
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Example of an HVAC installer’s balancing report form
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