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Video:

Support at Intervals for Flex Ducts (1)

Image:

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 seals gaps between the vapor barrier and pipes that penetrate through the subslab vapor barrier.

Tape seals gaps between the vapor barrier and pipes that penetrate through the subslab vapor barrier.
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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.
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 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.
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The ducts are located in conditioned space in open-web joists between the floors and supported to prevent sagging.

The ducts are located in conditioned space in open-web joists between the floors and supported to prevent sagging.
Image:

The exhaust ducts use gable end vent- the foil duct exits the vent but likely does not have a proper terminating vent with grill; the corrugated plastic vent does not go outside. Smooth metal ducts, rather than corrugated, provide best air flow

The exhaust ducts use gable end vent- the foil duct exits the vent but likely does not have a proper terminating vent with grill; the corrugated plastic vent does not go outside. Smooth metal ducts, rather than corrugated, provide best air flow