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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: Replacing Resistance Heating with Mini-Split Heat Pumps

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 ductless air handler of a ductless heat pump can be mounted above the ceiling so that only the register is visible

The ductless air handler of a ductless heat pump can be mounted above the ceiling so that only the register is visible
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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.
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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
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The gap between the duct boot and the drywall is air sealed by covering the seam with fiberglass mesh tape and mastic.

The gap between the duct boot and the drywall is air sealed by covering the seam with fiberglass mesh tape and mastic.
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The gaps around this duct boot are sealed with canned spray foam.

The gaps around this duct boot are sealed with canned spray foam.
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The gaps between the sheet metal of the duct boot and the drywall are clearly visible in this image.

The gaps between the sheet metal of the duct boot and the drywall are clearly visible in this image.
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The grille in the photo on the left brings air into a return air plenum under an air handler platform. As shown in the infrared image on the right, the plenum is not air sealed so hot attic air is being pulled into the air handler closet.

The grille in the photo on the left brings air into a return air plenum under an air handler platform. As shown in the infrared image on the right, the plenum is not air sealed so hot attic air is being pulled into the air handler closet.
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The grooves and ridges within flexible ducts can collect dust and dirt

The grooves and ridges within flexible ducts can collect dust and dirt