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Image:

Failure in attic insulation effectiveness caused by wind washing pushing insulation away from the edges of the attic space.

Failure in attic insulation effectiveness caused by wind washing pushing insulation away from the edges of the attic space.
Case Study:

Fairburn Community

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Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed

Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed
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Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed

Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed
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Fan does not have optimal fan-to-ceiling clearance

Fan does not have optimal fan-to-ceiling clearance
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Fan housing was oriented in the correct direction to allow proper exhaust duct installation

Fan housing was oriented in the correct direction to allow proper exhaust duct installation
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Fan shares exhaust and does not have dack-draft damper installed

Fan shares exhaust and does not have dack-draft damper installed
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Fan shares exhaust and has a back-draft damper installed

Fan shares exhaust and has a back-draft damper installed
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Fans from seperate dwellings exhausted together without back-draft dampers and not sealed

Fans from seperate dwellings exhausted together without back-draft dampers and not sealed
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Fans supply outdoor air tempered by indoor corridor air to the corridors of a multistory multifamily building, pressurizing the corridors and providing make-up air for the elevator shaft, which is depressurized by an exhaust fan.

Fans supply outdoor air tempered by indoor corridor air to the corridors of a multistory multifamily building, pressurizing the corridors and providing make-up air for the elevator shaft, which is depressurized by an exhaust fan.
CAD File:

FEMA P-320 Safe Room Design CMU Plans and Details

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FEMA P-320 Safe Room Design CMU Plans and Details
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Fiber board sheets are available with pre-cut shiplapped ends

Fiber board sheets are available with pre-cut shiplapped ends
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Fiberglass duct board typically comes in sheets 4 foot wide by 10 foot long

Fiberglass duct board typically comes in sheets 4 foot wide by 10 foot long
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Fiberglass mesh tape is installed around a duct boot in preparation for air sealing with mastic

Fiberglass mesh tape is installed around a duct boot in preparation for air sealing with mastic
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Fiberglass mesh tape is installed around a duct boot in preparation for air-sealing the seams with mastic.

Fiberglass mesh tape is installed around a duct boot in preparation for air-sealing the seams with mastic.
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Filter access panel includes gasket or comparable sealing mechanism and fits snugly against the exposed edge of filter when closed to prevent bypass

Filter access panel includes gasket or comparable sealing mechanism and fits snugly against the exposed edge of filter when closed to prevent bypass
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Filter located and installed so as to facilitate access and regular service by the owner

Filter located and installed so as to facilitate access and regular service by the owner
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Finished raised ceiling duct chase

Finished raised ceiling duct chase
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Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.

Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.
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Flex ducts are compressed

Flex ducts are compressed
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Flexible ducts in unconditioned space not installed in cavities smaller than outer duct diameter; in conditioned space not installed in cavities smaller than inner duct diameter

Flexible ducts in unconditioned space not installed in cavities smaller than outer duct diameter; in conditioned space not installed in cavities smaller than inner duct diameter
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Flexible ducts supported at intervals as recommended by mfr. but at a distance ≤ 5 ft

Flexible ducts supported at intervals as recommended by mfr. but at a distance ≤ 5 ft
Video:

Floor Above Garage

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Floor cavity air pressure is measured by placing a tube into the floor cavity through a small drilled hole

Floor cavity air pressure is measured by placing a tube into the floor cavity through a small drilled hole