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Case Study:

Technology Solutions Case Study: Stand-Off Furring in Deep Energy Retrofits

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The air tightness of the garage-to-house air barrier can be tested with a blower door kit and two manometers

The air tightness of the garage-to-house air barrier can be tested with a blower door kit and two manometers
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The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation

The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation
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The back dam of the window sill will force water out

The back dam of the window sill will force water out
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The batt insulation shown here was properly installed to fill the ceiling cavities.

The batt insulation shown here was properly installed to fill the ceiling cavities.
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The builder installed this OSB under the roof rafters and air sealed the seams with tape then added a dropped drywall ceiling to provide a service cavity for ducts and wiring, while minimizing holes into the attic.

The builder installed this OSB under the roof rafters and air sealed the seams with tape then added a dropped drywall ceiling to provide a service cavity for ducts and wiring, while minimizing holes into the attic.
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The ceiling drywall is sealed to the top plates with caulk.

The ceiling drywall is sealed to the top plates with caulk.
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The concrete slab is thermally isolated from the concrete foundation stem wall

The concrete slab is thermally isolated from the concrete foundation stem wall
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The concrete slab is thermally isolated from the concrete foundation stem wall and the stem wall is insulated for cold climates

The concrete slab is thermally isolated from the concrete foundation stem wall and the stem wall is insulated for cold climates
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The dark purple areas and long streaks in this IR camera image show extreme cold spots along the top of the walls, indicating a lack of both air sealing and insulation above the top plates of these walls.

The dark purple areas and long streaks in this IR camera image show extreme cold spots along the top of the walls, indicating a lack of both air sealing and insulation above the top plates of these walls.
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The dark spots on the ceiling in this infrared camera image likely indicate missing or displaced attic insulation.

The dark spots on the ceiling in this infrared camera image likely indicate missing or displaced attic insulation.
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The dark streaks seen in this infrared camera image of a return vent in a ceiling indicate cooler air is leaking in around the vent.

The dark streaks seen in this infrared camera image of a return vent in a ceiling indicate cooler air is leaking in around the vent.
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The drywall above the chase extends beyond adjoining top plates for a continuous air barrier

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

The drywall above the dropped ceiling duct chase extends beyond adjoining top plates for a continuous air barrier
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The floor cavities under this attic kneewall are completely open to the unconditioned attic space and a prime target for wind washing

The floor cavities under this attic kneewall are completely open to the unconditioned attic space and a prime target for wind washing
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The ICF consists of foam forms that are held in place with plastic or metal spacers and reinforced with metal rebar

The ICF consists of foam forms that are held in place with plastic or metal spacers and reinforced with metal rebar
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The ICF walls of this home are braced to prepare for pouring the concrete

The ICF walls of this home are braced to prepare for pouring the concrete
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The light fixture is connected to the exhaust fan with an electric wire which is sometimes hard wired but in this case is plugged in so it can be unplugged to clean the light fixture and access the fan for cleaning

The light fixture is connected to the exhaust fan with an electric wire which is sometimes hard wired but in this case is plugged in so it can be unplugged to clean the light fixture and access the fan for cleaning
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The living space in this multistory, multifamily building is thermally insulated from the outside and the unconditioned garage below by insulating above the podium slab

The living space in this multistory, multifamily building is thermally insulated from the outside and the unconditioned garage below by insulating above the podium slab
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The nut holding the light housing in place in this combination exhaust fan/light can be unscrewed by hand

The nut holding the light housing in place in this combination exhaust fan/light can be unscrewed by hand
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The original corner seam is air-sealed with caulk, then rigid foam is installed on the existing garage ceiling and walls, and finally covered with drywall.

The original corner seam is air-sealed with caulk, then rigid foam is installed on the existing garage ceiling and walls, and finally covered with drywall.
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The Perfect Wall Explained

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The purple streaks in this IR camera image indicate air leakage along the top plates, which is allowing cold air to be pulled from the attic into the wall cavities of this interior wall.

The purple streaks in this IR camera image indicate air leakage along the top plates, which is allowing cold air to be pulled from the attic into the wall cavities of this interior wall.
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The rim joists and top plates are air sealed and insulated with open-cell spray foam while the walls are filled with blown fiberglass.

The rim joists and top plates are air sealed and insulated with open-cell spray foam while the walls are filled with blown fiberglass.