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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 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 STAR central exhaust ventilation test is performed on a rooftop ERV duct system by an ENERGY STAR MFNC rater

An ENERGY STAR central exhaust ventilation test is performed on a rooftop ERV duct system by an ENERGY STAR MFNC rater.
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An in-line airflow station installed in rigid duct provides a location to measure ventilation airflow

An in-line airflow station installed in rigid duct provides a location to measure ventilation airflow
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An oil-fired boiler with direct combustion air and exhaust venting

An oil-fired boiler with direct combustion air and exhaust venting
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An ultra-efficient layer of R-20 rigid foam foundation insulation covers the ground underneath the vapor barrier and radiant floor loops, which will circulate water heated by an ultra-efficient geo heat pump.

An ultra-efficient layer of R-20 rigid foam foundation insulation covers the ground underneath the vapor barrier and radiant floor loops, which will circulate water heated by an ultra-efficient geo heat pump.
Video:

Andy Roe Describes the Ground Source Heat Pump at Weller Elementary

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Apply a nylon tie on top of the tape.

Apply a nylon tie on top of the tape.
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Apply a robust amount of UL-181 fiber reinforced duct sealant mastic paste to cover well past the edges of the tape.

Apply a robust amount of UL-181 fiber reinforced duct sealant mastic paste to cover well past the edges of the tape.
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Apply a thick layer of UL-181 fiber reinforced duct sealant mastic paste spanning over the polyester film of the flex duct core, the tape, and nylon tie, to the take-off collar.

Apply a thick layer of UL-181 fiber reinforced duct sealant mastic paste spanning over the polyester film of the flex duct core, the tape, and nylon tie, to the take-off collar.
Presentation:

ASES March Webinar: Uncoupling Solar Light and Heat in Passive Solar Design

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Assembled section of fiber board duct

Assembled section of fiber board duct
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Back-draft damper still has a piece of tape that prevented it from rattling during shipping

Back-draft damper still has a piece of tape that prevented it from rattling during shipping
Video:

Backdraft Dampers

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Baseboard radiators are one means of distributing hot water heat

Baseboard radiators are one means of distributing hot water heat
Case Study:

Baxter Community - High Performance Green Building

Baxter Community - High Performance Green Building
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Because this ICF and spray foamed house is so well insulated, the HVAC system is smaller, the round metal ducts are smaller diameter, and the duct layout is more compact.

Because this ICF and spray foamed house is so well insulated, the HVAC system is smaller, the round metal ducts are smaller diameter, and the duct layout is more compact.
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Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa

Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
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Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa

Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
Video:

BetterBuiltNW: Introduction to Ductless Heat Pumps Part D—Installing Systems

Video:

BetterBuiltNW: The Basic Concepts Used in Calculating Heating and Cooling Requirements