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Clean the attic floor of debris prior to installing new attic insulation. Use baffles to provide a path for ventilation air entering the attic from the soffit vents

Clean the attic floor of debris prior to installing new attic insulation. Use baffles to provide a path for ventilation air entering the attic from the soffit vents
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Clean the dust off the duct board where the tape will be applied. Apply a robust amount of Foil-Scrim-Kraft (FSK) duct tape.

Clean the dust off the duct board where the tape will be applied. Apply a robust amount of Foil-Scrim-Kraft (FSK) duct tape.
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Closed-cell spray foam covers the heat recovery ventilator ducts and also seals all top plates and seams in the ceiling drywall of the vented attic.

Closed-cell spray foam covers the heat recovery ventilator ducts and also seals all top plates and seams in the ceiling drywall of the vented attic.
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Closed-cell spray foam insulation covers the attic floor to provide a continuous air control layer.

Closed-cell spray foam insulation covers the attic floor to provide a continuous air control layer.
Case Study:

Coastal Habitats

Video:

Cold Climate Building Techniques and Concepts: Cathedral Roofs

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Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off

Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off
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Common exhaust duct not shared by fans in separate dwellings

Common exhaust duct not shared by fans in separate dwellings
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Compact duct design layout

Compact duct design layout
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Compact duct layout example

Compact duct layout example
CAD File:

Conceptual insulation at cape-style roof - ceiling and knee wall cavity insulation

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Conceptual insulation at cape-style roof - ceiling and knee wall cavity insulation
CAD File:

Conceptual insulation at cape-style roof - roof cavity insulation with rigid insulation closure

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Conceptual insulation at cape-style roof - roof cavity insulation with rigid insulation closure
CAD File:

Conceptual insulation practice at attic-style truss system - above conditioned space

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Conceptual insulation practice at attic-style truss system - above conditioned space
CAD File:

Conceptual insulation practice at attic-style truss system - above unconditioned space

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Conceptual insulation practice at attic-style truss system - above unconditioned space
Video:

Conducting a Residential Duct Leakage Test and Blower Door Test: Duct blaster testing – Hooking up the duct blaster to the return register

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Conducting a Residential Duct Leakage Test and Blower Door Test: Quick and easy set up of the blower door and determination of whole house air leakage

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Conducting a Residential Duct Leakage Test and Blower Door Test: Sequencing - Run the blower door test first

Video:

Conducting a Residential Duct Leakage Test: Why set the Duct Fan to Depressurize not Pressurize the Home

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Connect the plastic application tunnel from the injection equipment to the supply plenum.

Connect the plastic application tunnel from the injection equipment to the supply plenum.
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Connect the plastic application tunnel to the injection equipment

Connect the plastic application tunnel to the injection equipment
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Connection in place but not sealed

Connection in place but not sealed
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Consider using a metal duct elbow instead of flex duct at boot connections to prevent compressions

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

Coordinate with other trades including framers, plumbers, and electricians to prevent needless looping of flex duct
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Correct air sealing methods for common attic bypass air leakage paths.

Correct air sealing methods for common attic bypass air leakage paths.