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The manometer hose for a duct leakage test is connected to a static pressure probe which will be inserted into a duct with the tip pointing into the oncoming air stream

The manometer hose for a duct leakage test is connected to a static pressure probe which will be inserted into a duct with the tip pointing into the oncoming air stream
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The nut holding the light housing in place in this combination exhaust fan/light can be unscrewed by hand

The nut holding the light housing in place in this combination exhaust fan/light can be unscrewed by hand
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The pointed tip of this static pressure probe should point directly upstream into the oncoming airflow

The pointed tip of this static pressure probe should point directly upstream into the oncoming airflow
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The potential motion detection range for one model of wall-mounted passive-infrared sensors used for lighting controls

The potential motion detection range for one model of wall-mounted passive-infrared sensors used for lighting controls
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The round metal HVAC ducts are sealed with mastic at all joints and seams.

The round metal HVAC ducts are sealed with mastic at all joints and seams.
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The sealed, insulated crawlspace is a clean, dry location to house the main floor heating ducts and also provides bonus storage space.

The sealed, insulated crawlspace is a clean, dry location to house the main floor heating ducts and also provides bonus storage space.
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The seam between this duct register and the wood flooring is sealed with caulk to prevent air leakage into the house from the crawlspace below.

The seam between this duct register and the wood flooring is sealed with caulk to prevent air leakage into the house from the crawlspace below.
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The seams in this HVAC duct are sealed with mastic.

The seams in this HVAC duct are sealed with mastic.
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The single strap cannot support the bend and is nearly severing the flex duct

The single strap cannot support the bend and is nearly severing the flex duct
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The spring clips from the new LED retrofit ceiling light kit should attach into the brackets in the original recessed light housing

The spring clips from the new LED retrofit ceiling light kit should attach into the brackets in the original recessed light housing
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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 very dark area around the recessed light fixture shows significant heat loss while the purple streaks radiating out indicate air leakage; the purple area around the heating register (left) indicates heat loss likely due to missing insulation

The very dark area around the recessed light fixture indicates significant heat loss while the purple streaks radiating out indicate air leakage; the purple area around the heating register to the left indicates heat loss likely due to missing insulation
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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 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