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A theatrical fog machine produces dense fog that can be used to blow fog into a duct system to make leaks obvious.

A theatrical fog machine produces dense fog that can be used to blow fog into a duct system to make leaks obvious.
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A triple-filtered energy recovery ventilator is installed with individual supply ducts to provide fresh air to each room.

A triple-filtered energy recovery ventilator is installed with individual supply ducts to provide fresh air to each room.
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After cleaning the exhaust fan, the gap around the fan between the fan housing and the drywall should be caulked to stop air leakage from the house to the attic

After cleaning the exhaust fan, the gap around the fan between the fan housing and the drywall should be caulked to stop air leakage from the house to the attic
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After connecting with sheet metal screws, this take-off collar is then air sealed and further secured using UL 181 fiber-reinforced duct sealant mastic paste.

After connecting with sheet metal screws, this take-off collar is then air sealed and further secured using UL 181 fiber-reinforced duct sealant mastic paste.
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After its thorough cleaning, this exhaust fan should operate much more efficiently and quietly

After its thorough cleaning, this exhaust fan should operate much more efficiently and quietly
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After removing the light bulb from this combination exhaust fan/light, the housing for the light can be removed by unscrewing this nut

After removing the light bulb from this combination exhaust fan/light, the housing for the light can be removed by unscrewing this nut
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After securing the inner coil, cover the draw band and the seam with a generous amount of mastic

After securing the inner coil, cover the draw band and the seam with a generous amount of mastic
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Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities

Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities
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Air seal a heat pump or air conditioner air handler cabinet at all seams, holes, and junctions

Air seal a heat pump or air conditioner air handler cabinet at all seams, holes, and junctions
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Air seal all holes and seams in the furnace cabinet with mastic, foil tape, or putty

Air seal all holes and seams in the furnace cabinet with mastic, foil tape, or putty
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Air seal and insulate flex ducts

Air seal and insulate flex ducts
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Air seal around all duct shafts and flues installed through ceilings, walls, or flooring to keep conditioned air from leaking into unconditioned space.

Air seal around all duct shafts and flues installed through ceilings, walls, or flooring to keep conditioned air from leaking into unconditioned space.
CAD File:

Air seal at chase walls - plan

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Air seal at chase walls - plan
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Air seal at duct boot

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Air seal at duct boot
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Air seal at duct soffit

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Air seal at duct soffit
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Air seal duct boot to ceiling by installing fiberglass mesh tape and mastic over seam

Air seal duct boot to ceiling by installing fiberglass mesh tape and mastic over seam
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All dampers should be completely open in a duct system being tested for air leakage; looking at the actuator from outside the duct is not a reliable way to know damper position, so the pressure downstream of the damper should be measured

All dampers should be completely open in a duct system being tested for air leakage; looking at the actuator from outside the duct is not a reliable way to know damper position, so the pressure downstream of the damper should be measured
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All dampers should be completely open in a duct system being tested for air leakage; this damper is only partially open and should be opened fully prior to testing

All dampers should be completely open in a duct system being tested for air leakage; this damper is only partially open and should be opened fully prior to testing
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All of the ductwork for the efficient (8.5 HSPF, 15 SEER) heat pump is mastic sealed and installed in conditioned space.

All of the ductwork for the efficient (8.5 HSPF, 15 SEER) heat pump is mastic sealed and installed in conditioned space.
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All other supply ducts and all return ducts in unconditioned space have insulation ≥ R-6

All other supply ducts and all return ducts in unconditioned space have insulation ≥ R-6
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An energy recovery ventilator (ERV) transfers both heat and moisture between incoming and outgoing streams of air

An energy recovery ventilator (ERV) transfers both heat and moisture between incoming and outgoing streams of air
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An energy recovery ventilator provides filtered fresh air to every room in the house.

An energy recovery ventilator provides filtered fresh air to every room in the house.
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An Energy Recovery Ventilator provides outside air to this dwelling unit; a range hood with dedicated makeup air provides local kitchen exhaust; a Packaged Terminal Heat Pump provides conditioned air

An Energy Recovery Ventilator provides outside air to this dwelling unit; a range hood with dedicated makeup air provides local kitchen exhaust; a Packaged Terminal Heat Pump provides conditioned air
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An Energy Recovery Ventilator provides outside air to this dwelling unit; a range hood with dedicated makeup air provides local kitchen exhaust; a Packaged Terminal Heat Pump provides conditioned air and dehumidification is provided separately

An Energy Recovery Ventilator provides outside air to this dwelling unit; a range hood with dedicated makeup air provides local kitchen exhaust; a Packaged Terminal Heat Pump provides conditioned air and dehumidification is provided separately