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A constant airflow regulator is a modulating orifice that automatically regulates airflows in duct systems to constant levels

A constant airflow regulator is a modulating orifice that automatically regulates airflows in duct systems to constant levels
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A constant airflow regulator is fitted into the neck of the supply duct to control air flow to deliver the design airflow regardless of pressure variations

A constant airflow regulator is fitted into the neck of the supply duct to control air flow to deliver the design airflow regardless of pressure variations
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A detergent port on a steel boiler

A detergent port on a steel boiler
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A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts

A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts
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A fresh air inlet is ducted to the return side of the home’s central air handler; a motorized damper and electronic controls help balance the flow of fresh incoming air with controlled exhaust to meet ventilation requirements

A fresh air inlet is ducted to the return side of the home’s central air handler; a motorized damper and electronic controls help balance the flow of fresh incoming air with controlled exhaust to meet ventilation requirements
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A home is tested at two points for enclosure air leakage

A home is tested at two points for enclosure air leakage
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A main vent is installed on the side of a drip leg

A main vent is installed on the side of a drip leg
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A metal storm panel is installed in a track permanently mounted above and below the window frame and secured with wing nuts to studs mounted on the track.

A metal storm panel is installed in a track permanently mounted above and below the window frame and secured with wing nuts to studs mounted on the track.
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A riser vent is installed on the stub-out below the hand valve

A riser vent is installed on the stub-out below the hand valve
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A tree of main vents is installed on top of drip piping

A tree of main vents is installed on top of drip piping
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Accordion-type hurricane shutters protect sliding glass doors from high winds and wind-borne debris.

Accordion-type hurricane shutters protect sliding glass doors from high winds and wind-borne debris.
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Adding weatherstripping to a door

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Adjustable jamb/head weatherstripping.

Adjustable jamb/head weatherstripping.
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Advanced framing details include insulated headers over windows and doors.

Advanced framing details include insulated headers over windows and doors.
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Advanced framing details include minimal framing at windows and doors.

Advanced framing details include minimal framing at windows and doors.
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Advanced framing details throughout house including insulated and open headers

Advanced framing details throughout house including insulated and open headers
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Advanced framing showing open headers

Advanced framing showing open headers
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Air seal door and window rough openings with backer rod, caulk, or nonexpanding foam

Air seal door and window rough openings with backer rod, caulk, or nonexpanding foam
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Air seal rough opening from inside

Air seal rough opening from inside
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Air-seal exterior doors to minimize air leakage.

Air-seal exterior doors to minimize air leakage.
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Air-seal the rough opening around doors and windows to minimize air leakage.

Air-seal the rough opening around doors and windows to minimize air leakage.
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An air vent mounted high on the radiator will shut quickly and limit the radiator’s heat output

An air vent mounted high on the radiator will shut quickly and limit the radiator’s heat output
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An air vent mounted low on the radiator will allow more steam to enter the radiator before it shuts

An air vent mounted low on the radiator will allow more steam to enter the radiator before it shuts
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An anode bar (upper grey bar) is installed in a steel boiler

An anode bar (upper grey bar) is installed in a steel boiler