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Case Study:

DOE ZERH HIA 2024 Case Study: TC Legend Homes, Lynden Powerhouse, Lynden, WA

Case Study:

DOE ZERH HIA 2024 Case Study: Thrive Home Builders, The E-PWR Volt Townhome at Loretto Heights, Denver, CO

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Door has been undercut to allow for specified amount of air flow therefore contributing to pressure balancing

Door has been undercut to allow for specified amount of air flow therefore contributing to pressure balancing
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Door is not undercut therefore not contributing to pressure balancing

Door is not undercut therefore not contributing to pressure balancing
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Dryer exhaust duct should vent directly to the exterior via a smooth, rigid metal duct

Dryer exhaust duct should vent directly to the exterior via a smooth, rigid metal duct
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Dryer exhaust line terminates in the crawlspace

Dryer exhaust line terminates in the crawlspace
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Dryer vent is run vertical with a 90 degree bend and does not vent to the outside

Dryer vent is run vertical with a 90 degree bend and does not vent to the outside
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Dryer vents directly to the outdoors

Dryer vents directly to the outdoors
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Dryer vents directly to the outdoors

Dryer vents directly to the outdoors
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Drywall is installed both prior to and after HVAC equipment is installed to create an airtight closet away from garage pollutants.

Drywall is installed both prior to and after HVAC equipment is installed to create an airtight closet away from garage pollutants.
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Drywall is installed, hiding the duct work

Drywall is installed, hiding the duct work
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Duct boot is air sealed to ceiling by covering the seam with fiberglass mesh tape and mastic

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

Duct boots sealed to floor, wall, or ceiling using caulk, foam, mastic tape, or mastic paste
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Duct insulation is installed over boot

Duct insulation is installed over boot
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Duct is compressed

Duct is compressed
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Duct is compressed

Duct is compressed
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Duct is kinked in cavity

Duct is kinked in cavity
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Duct is located in unconditioned space and is not insulated

Duct is located in unconditioned space and is not insulated
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Duct is located in unconditioned space and is properly insulated

Duct is located in unconditioned space and is properly insulated
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Duct is run straight and supported properly

Duct is run straight and supported properly
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Duct is run straight and supported properly

Duct is run straight and supported properly
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Duct lacks adequate support to carry the weight so the few straps are pinching the duct

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 is properly sealed with mastic

Duct to boot connection of jump duct is properly sealed with mastic
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Duct to boot connection of jump duct not fastened and sealed

Duct to boot connection of jump duct not fastened and sealed