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Super-heated air and gases from wildfires will dry and heat the fuel, both vegetation and structures, in the path of the oncoming, uphill-moving fire.

Super-heated air and gases from wildfires will dry and heat the fuel, both vegetation and structures, in the path of the oncoming, uphill-moving fire.
Video:

Support at Intervals for Flex Ducts (1)

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Tape over the seam connecting the flex duct to the trunk duct; in this case two 3-inch-wide pieces of tape were put together then laid over the seam.

Tape over the seam connecting the flex duct to the trunk duct; in this case two 3-inch-wide pieces of tape were put together then laid over the seam.
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Tape the flex duct core to the take-off collar using UL-181 foil mastic tape.

Tape the flex duct core to the take-off collar using UL-181 foil mastic tape.
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Taping polyethylene sheeting at interior pier footings

Taping polyethylene sheeting at interior pier footings
Case Study:

Technology Solutions Case Study: Buried and Encapsulated Ducts, Jacksonville, Florida

Case Study:

Technology Solutions Case Study: Duct Sealing Using Injected Spray Sealant

Case Study:

Technology Solutions Case Study: High-Performance Ducts in Hot-Dry Climates

Case Study:

Technology Solutions Case Study: Properly Sized and Located Return Air Inlets

Case Study:

Technology Solutions Case Study: Raised Ceiling Interior Duct System

Case Study:

Technology Solutions Case Study: Sealed Air-Return Plenum Retrofit

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The AC unit has a drip pan and automatic shutoff in case the condensate drain gets clogged.

The AC unit has a drip pan and automatic shutoff in case the condensate drain gets clogged.
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The attic duct chase insulated and sealed to the attic floor with spray foam

The attic duct chase insulated and sealed to the attic floor with spray foam
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The attic is sealed and insulated along the underside of the roof deck with 5.5 inches of polyurethane spray foam, providing conditioned space for the HVAC system.

The attic is sealed and insulated along the underside of the roof deck with 5.5 inches of polyurethane spray foam, providing conditioned space for the HVAC system.
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The below-grade wall assembly includes dampproofing, draining details, and insulation.

The below-grade wall assembly includes dampproofing, draining details, and insulation.
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The chase is laid out on the plans (grey highlighted areas) to aid sub-contractors to execute the design

The chase is laid out on the plans (grey highlighted areas) to aid sub-contractors to execute the design
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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 duct for this exhaust fan is properly routed through the roof and the duct is insulated

The duct for this exhaust fan is properly routed through the roof and the duct is insulated
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The duct sealing spray injection system application tunnel inflates as the injection system operates

The duct sealing spray injection system application tunnel inflates as the injection system operates
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The duct sealing spray injection system includes a blower/heater (background) and the sealant injection unit (foreground)

The duct sealing spray injection system includes a blower/heater (background) and the sealant injection unit (foreground)
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The duct tester and blower door are set up to measure leakage to the outdoors

The duct tester and blower door are set up to measure leakage to the outdoors
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The duct tester is set up to depressurize the duct system.

The duct tester is set up to depressurize the duct system.