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The tape is applied with even pressure to ensure the seams in the rigid foam sheathing are air sealed on this manufactured home.

The tape is applied with even pressure to ensure the seams in the rigid foam sheathing are air sealed on this manufactured home.
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The tape is covered with mastic to ensure an airtight seal between the duct and the fitting

The tape is covered with mastic to ensure an airtight seal between the duct and the fitting
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The test fan for this central ERV duct leakage test is connected to the duct system from inside the ERV cabinet

The test fan for this central ERV duct leakage test is connected to the duct system from inside the ERV cabinet
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The test fan for this rooftop duct test is connected to the central exhaust duct via a transition plate at the rooftop curb

The test fan for this rooftop duct test is connected to the central exhaust duct via a transition plate at the rooftop curb
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The unsealed register boot is going through the side wall of the chase

The unsealed register boot is going through the side wall of the chase
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The vertical Z-bar passes lengthwise through the sheathing and forms a significant thermal bridge through the insulation to the steel wall studs; it should be avoided

The vertical Z-bar passes lengthwise through the sheathing and forms a significant thermal bridge through the insulation to the steel wall studs; it should be avoided
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The walls of this mixed-humid location home are constructed with moisture-resistant steel-framed expanded polystyrene R-34 wall panels that are designed to withstand winds up to 200 mph and level D seismic forces.

The walls of this mixed-humid location home are constructed with moisture-resistant steel-framed expanded polystyrene R-34 wall panels that are designed to withstand winds up to 200 mph and level D seismic forces.
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The wood blocking for future PV panel installation extends above the surface of the top layer of polyisocyanurate rigid foam insulation installed as part of a flat roof retrofit

The wood blocking for future PV panel installation extends above the surface of the top layer of polyisocyanurate rigid foam insulation installed as part of a flat roof retrofit
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There are large, unsealed gaps where this HVAC duct penetrates the subfloor to supply a floor register; these gaps should be sealed with spray foam.

There are large, unsealed gaps where this HVAC duct penetrates the subfloor to supply a floor register; these gaps should be sealed with spray foam.
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There should be less than 2.5 inches per each five foot of duct length

There should be less than 2.5 inches per each five foot of duct length
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Thermal and air barriers at rim joist or new blocking prevent Infiltration of unconditioned air into the floor cavity

Thermal and air barriers at rim joist or new blocking prevent Infiltration of unconditioned air into the floor cavity
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These ducts are sealed with Underwriter Laboratories-approved metal tape.

These ducts are sealed with Underwriter Laboratories-approved metal tape.
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These ducts were installed within the home's conditioned space in a central chaise down the main hallway.

These ducts were installed within the home's conditioned space in a central chaise down the main hallway.
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These factory-built walls consist of 9.5-inch I-studs sheathed with coated OSB, faced with OSB, and dense-packed with cellulose; a second interior surface of drywall is added to provide a 1.5-inch cavity for electrical wiring.

These factory-built walls consist of 9.5-inch I-studs sheathed with coated OSB, faced with OSB, and dense-packed with cellulose; a second interior surface of drywall is added to provide a 1.5-inch cavity for electrical wiring.
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These two schematics show the plan-view of the same duct system; the upper schematic shows all supply and return outlets and inlets uncovered for normal operation, and the lower schematic shows them covered before beginning a duct leakage test.

These two schematics show the plan-view of the same duct system; the upper schematic shows all supply and return outlets and inlets uncovered for normal operation, and the lower schematic shows them covered before beginning a duct leakage test.
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This “high static ducted cassette” heat pump system is similar to a traditional centrally ducted system, serving several areas of a home from one indoor unit

This “high static ducted cassette” heat pump system is similar to a traditional centrally ducted system, serving several areas of a home from one indoor unit
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This air register has noticeable gaps between it and the floor; use canned spray foam to fill in the gaps.

This air register has noticeable gaps between it and the floor; use canned spray foam to fill in the gaps.
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This bath fan duct actually has a termination vent attached at the end of the duct but the vent is sitting on the attic floor instead of attaching through the roof so humid air is exhausting into the attic

This bath fan duct actually has a termination vent attached at the end of the duct but the vent is sitting on the attic floor instead of attaching through the roof so humid air is exhausting into the attic
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This bath fan is ducted through the roof but the ducting is so excessively long that air flow is likely to be very poor

This bath fan is ducted through the roof but the ducting is so excessively long that air flow is likely to be very poor
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This Central Fan Integrated Supply (CFIS) duct is undersized and kinked, limiting required airflow This Central Fan Integrated Supply (CFIS) duct is undersized and kinked, limiting required airflow

This Central Fan Integrated Supply (CFIS) duct is undersized and kinked, limiting required airflow This Central Fan Integrated Supply (CFIS) duct is undersized and kinked, limiting required airflow
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This constant airflow regulator (CAR) has been fouled by aerosolized sealant because it was not covered while the ducts were being sealed with the aerosolized acrylic sealant.

This constant airflow regulator (CAR) has been fouled by aerosolized sealant because it was not covered while the ducts were being sealed with the aerosolized acrylic sealant.
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This constant airflow regulator (CAR) has been fouled by deposition of aerosolized sealant because it was not protected during duct sealing

This constant airflow regulator (CAR) has been fouled by deposition of aerosolized sealant because it was not protected during duct sealing
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This dropped soffit runs the length of the house providing a convenient place to locate one trunk duct with several very short side ducts that supply heat and cooling to most rooms of the house.

This dropped soffit runs the length of the house providing a convenient place to locate one trunk duct with several very short side ducts that supply heat and cooling to most rooms of the house.
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This duct became disconnected from the trunk duct because the duct take-off was poorly installed.

This duct became disconnected from the trunk duct because the duct take-off was poorly installed.