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Roof penetrations are minimized to provide more space for PV panels.

Roof penetrations are minimized to provide more space for PV panels.
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Roof-mounted solar panels shade the roof below them (left), significantly reducing the roof’s surface temperature (thermal image on the right - yellow region under the panels is cooler than the red and white region on the exposed portion of the roof)

Roof-mounted solar panels shade the roof below them (left), significantly reducing the roof’s surface temperature (thermal image on the right - yellow region under the panels is cooler than the red and white region on the exposed portion of the roof)
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Roofing material and slope

Roofing material and slope
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Roofing membrane is installed over polyisocyanurate rigid foam insulation and insulation cover board that has been cut to fit around locations for blocking for the PV system rack

Roofing membrane is installed over polyisocyanurate rigid foam insulation and insulation cover board that has been cut to fit around locations for blocking for the PV system rack
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Rooftop portion of thermosiphon solar hot water system

Rooftop portion of thermosiphon solar hot water system
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Run-out duct is sealed with mastic

Run-out duct is sealed with mastic
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Run-out ducts are installed over partition walls

Run-out ducts are installed over partition walls
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Sample results from a total duct leakage test at final

Sample results from a total duct leakage test at final
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Sample results from a total duct leakage test at rough-in

Sample results from a total duct leakage test at rough-in
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Seal all holes and seams in furnace and air handler cabinets

Seal all holes and seams in furnace and air handler cabinets
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Seal all joints and seams in the metal ductwork with mastic before installing insulation

Seal all joints and seams in the metal ductwork with mastic before installing insulation
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Seal all wood framing joints surrounding the chase with sealant and lay a bead of sealant along top edge of chase framing

Seal all wood framing joints surrounding the chase with sealant and lay a bead of sealant along top edge of chase framing
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Seal all wood framing joints surrounding the chase with sealant and lay a bead of sealant on top edge of chase framing

Seal all wood framing joints surrounding the chase with sealant and lay a bead of sealant on top edge of chase framing
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Seal bottom layer of rigid insulation with adhesive, tape and nails

Seal bottom layer of rigid insulation with adhesive, tape and nails
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Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic

Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic
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Sealed and Insulated Flex Ducts

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Seams and connections in rigid metal ducts are air sealed using tape or mastic.

Seams and connections in rigid metal ducts are air sealed using tape or mastic.
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Seams are being properly sealed with mastic and mesh tape

Seams are being properly sealed with mastic and mesh tape
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Second layer of rigid insulation is adhered with foam

Second layer of rigid insulation is adhered with foam
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Self-piercing/self-drilling sheet metal screws are installed on the four tabs (indicated by red stars) to secure the take-off collar to the rectangular metal duct.

Self-piercing/self-drilling sheet metal screws are installed on the four tabs (indicated by red stars) to secure the take-off collar to the rectangular metal duct.
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Seperate dwellings with their own seperate exhaust terminations

Seperate dwellings with their own seperate exhaust terminations
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Seven categories of exterior window shading attachments, identified on the DOE Efficient Window Coverings website.

Seven categories of exterior window shading attachments, identified on the DOE Efficient Window Coverings website.
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Shed roofs provide more space for PV panels in this multifamily project near Denver, Colorado.

Shed roofs provide more space for PV panels in this multifamily project near Denver, Colorado.
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Sheet metal and mastic provide air sealing around a flue pipe.

Sheet metal and mastic provide air sealing around a flue pipe.