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If a dropped soffit is used to house a duct, the soffit space must equal the duct diameter plus the insulation thickness

If a dropped soffit is used to house a duct, the soffit space must equal the duct diameter plus the insulation thickness
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If airflow must be limited to a supply register, use balancing dampers at the trunk line rather than looping duct to control airflow

If airflow must be limited to a supply register, use balancing dampers at the trunk line rather than looping duct to control airflow
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If filter is inaccessible, locate the air filter between the return air plenum and the air handler box

If filter is inaccessible, locate the air filter between the return air plenum and the air handler box
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If furnace is accessible, locate the air filter between the return air plenum and the air handler box

If furnace is accessible, locate the air filter between the return air plenum and the air handler box
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If HVAC duct must be installed in an exterior wall, separate it from the exterior with at least R-6 of continuous rigid insulation

If HVAC duct must be installed in an exterior wall, separate it from the exterior with at least R-6 of continuous rigid insulation
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If the furnace is hard to access, locate filters at return registers covered by hinged grilles that are easy to open from inside the home

If the furnace is hard to access, locate filters at return registers covered by hinged grilles that are easy to open from inside the home
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If the top of a window opening is not level, a shim can be cut to ensure mounting brackets installed for blinds are level to one another.

If the top of a window opening is not level, a shim can be cut to ensure mounting brackets installed for blinds are level to one another.
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If wall registers are desired, install HVAC ducts in interior wall cavities

If wall registers are desired, install HVAC ducts in interior wall cavities
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Improperly installed fuel tanks can break free from attachments under the force of flood waters, risking broken fuel lines which could cause fire or explosion. Here, the tank is tethered only by the gas piping, which is not designed to perform this functi

Improperly installed fuel tanks can break free from attachments under the force of flood waters, risking broken fuel lines which could cause fire or explosion. Here, the tank is tethered only by the gas piping, which is not designed to perform this function.
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In this exhaust fan/light, both the light fixture and the fan are plugged in to the fan housing; unplug the light fixture to clean it and unplug the fan as an added precaution while cleaning the exhaust fan

In this exhaust fan/light, both the light fixture and the fan are plugged in to the fan housing; unplug the light fixture to clean it and unplug the fan as an added precaution while cleaning the exhaust fan
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In warm-humid climates, do not install Class 1 vapor retarders on the interior side of air-permeable insulation in above-grade walls, except at shower and tub walls.

In warm-humid climates, do not install Class 1 vapor retarders on the interior side of air-permeable insulation in above-grade walls, except at shower and tub walls.
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Inadequate amount of insulation installed with compression, misalignment, and voids

Inadequate amount of insulation installed with compression, misalignment, and voids
Presentation:

Indoor airPLUS Version 2 Reaches for the Sky: New Opportunities for Healthier Multifamily Buildings

Presentation:

Indoor airPLUS Version 2 Reaches for the Sky: New Opportunities for Healthier Multifamily Buildings

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Infrared thermography during depressurization testing reveals air leakage at corner of spray foam-insulated room where wood-to-wood seams in framing were not air sealed

Infrared thermography during depressurization testing reveals air leakage at corner of spray foam-insulated room where wood-to-wood seams in framing were not air sealed
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Insert the new furnace/air handler filter in the filter slot of the furnace or air handler with the arrow pointed in the direction of air flow.

Insert the new furnace/air handler filter in the filter slot of the furnace or air handler with the arrow pointed in the direction of air flow.
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Inside FORTIFIED Intro for Evaluators NCIUA

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Inside FORTIFIED Talking with the Roofer NCIUA

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Inside FORTIFIED: Fastening Sheathing on Existing Roofs in High Wind Areas

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Inside FORTIFIED: Fastening Sheathing on Existing Roofs in Hurricane Areas

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Inside FORTIFIED: Fastening Sheathing on New Roofs in High Wind & Hail Areas

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Inside FORTIFIED: Installing Drip Edge in High Wind Areas

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Inside FORTIFIED: Installing Drip Edge in Hurricane Areas

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Inside FORTIFIED: Installing Sealed Roof Deck with Self-Adhered Underlayment