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Image:

Seal all joints and seams in the metal ductwork with mastic before installing insulation

Seal all joints and seams in the metal ductwork with mastic before installing insulation
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Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic

Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic
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Seams are being properly sealed with mastic and mesh tape

Seams are being properly sealed with mastic and mesh tape
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See the printing on the cardboard frame of the air filter for the filter dimensions and the arrow indicating airflow direction; the arrow should point into the duct.

See the printing on the cardboard frame of the air filter for the filter dimensions and the arrow indicating airflow direction; the arrow should point into the duct.
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Separate exhaust fans can share a common exhaust if each exhaust fan is equipped with a back-draft damper to prevent cross contamination

Separate exhaust fans can share a common exhaust if each exhaust fan is equipped with a back-draft damper to prevent cross contamination
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Seperate dwellings with their own seperate exhaust terminations

Seperate dwellings with their own seperate exhaust terminations
Video:

Sewer Backflow and Pumps

Case Study:

Show Home Targets Energy Efficiency in Hot-Humid Climates

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Simplified schematic of a one-pipe steam system showing the main and risers with fast vents and the radiators with slow vents

Simplified schematic of a one-pipe steam system showing the main and risers with fast vents and the radiators with slow vents
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Size the filter box for the appropriate filter

Size the filter box for the appropriate filter
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Small, battery-powered evaporative coolers can be appropriate for personal cooling in arid climates (only)

Small, battery-powered evaporative coolers can be appropriate for personal cooling in arid climates (only)
Presentation:

Smart Home Energy Management for Ductless Mini-Splits

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Some radiators are behind covers so the cover must be removed to identify the air vent

Some radiators are behind covers so the cover must be removed to identify the air vent
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Sone rating is 3.0 for this intermittent exhaust fan

Sone rating is 3.0 for this intermittent exhaust fan
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Sone rating is greater than 1 on a continuous exhaust fan

Sone rating is greater than 1 on a continuous exhaust fan
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Sone rating is greater than 3.0

Sone rating is greater than 3.0
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Sone rating is less than or equal to 1 on a continuous exhaust fan

Sone rating is less than or equal to 1 on a continuous exhaust fan
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Spray foam insulates and air seals the underside of the attic roof and walls.

Spray foam insulates and air seals the underside of the attic roof and walls.
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Straps are spaced too far apart causing the straps to compress the duct under its own weight

Straps are spaced too far apart causing the straps to compress the duct under its own weight
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Supply-only ventilation with a fresh air intake ducted to the return side of a horizontal air handler unit located in the attic

Supply-only ventilation with a fresh air intake ducted to the return side of a horizontal air handler unit located in the attic
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Supply-only ventilation with a fresh air intake ducted to the return side of a vertical air handler unit located in the house

Supply-only ventilation with a fresh air intake ducted to the return side of a vertical air handler unit located in the house
Video:

Support at Intervals for Flex Ducts (1)

Case Study:

Suwanee River Administration Building

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Target Ventilation, Formula 4.1a from ASHRAE 62.2-2010

Target Ventilation, Formula 4.1a from ASHRAE 62.2-2010