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Cavity used for return is not insulated and is not air sealed, which will pull in air from outside

Cavity used for return is not insulated and is not air sealed, which will pull in air from outside
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Cavity was not air sealed

Cavity was not air sealed
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Ceiling gypsum board has been installed

Ceiling gypsum board has been installed
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Central ductwork systems for multifamily buildings include horizontal run outs with branches and take-offs connecting to air supply boots

Central ductwork systems for multifamily buildings include horizontal run outs with branches and take-offs connecting to air supply boots
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Charis Homes built this custom for buyer home in the cold climate in North Canton, OH, and certified it to DOE Zero Energy Ready Home specifications in 2016.

Charis Homes built this custom for buyer home in the cold climate in North Canton, OH, and certified it to DOE Zero Energy Ready Home specifications in 2016.
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Chase framing is completed and ready for drywall

Chase framing is completed and ready for drywall
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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.
Case Study:

Coastal Habitats

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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
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Concrete is being poured into the wall forms made by the rigid foam insulated concrete form blocks.

Concrete is being poured into the wall forms made by the rigid foam insulated concrete form blocks.
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Concrete is poured into the rigid foam shell of the insulated concrete form (ICF) walls; a plastic water barrier has already been installed to protect the below-grade wall surfaces.

Concrete is poured into the rigid foam shell of the insulated concrete form (ICF) walls; a plastic water barrier has already been installed to protect the below-grade wall surfaces.
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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

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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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Construct exterior walls with insulated concrete forms (ICFs) that provide insulation without thermal bridging, as well as air sealing, a drainage plane, and high structural strength.

Construct exterior walls with insulated concrete forms (ICFs) that provide insulation without thermal bridging, as well as air sealing, a drainage plane, and high structural strength.