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Ventilation air inlets ≥ 2 ft. above grade or roof deck in Climate Zones 1-3 or ≥ 4 ft. above grade or roof deck in Climate Zones 4-8 and not obstructed

Ventilation air inlets ≥ 2 ft. above grade or roof deck in Climate Zones 1-3 or ≥ 4 ft. above grade or roof deck in Climate Zones 4-8 and not obstructed
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Ventilation air inlets located ≥10 ft. of stretched-string distance from known contamination sources such as stack, vent, exhaust hood, or vehicle exhaust

Ventilation air inlets located ≥10 ft. of stretched-string distance from known contamination sources such as stack, vent, exhaust hood, or vehicle exhaust
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Ventilation air inlets provided with rodent / insect screen with ≤ 0.5 inch mesh

Ventilation air inlets provided with rodent / insect screen with ≤ 0.5 inch mesh
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Ventilation control is not obvious

Ventilation control is not obvious
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Ventilation control is not obvious

Ventilation control is not obvious
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Ventilation duct is compressed because supporting strap is too small

Ventilation duct is compressed because supporting strap is too small
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Ventilation in this dwelling unit is provided by an Energy Recovery Ventilator; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake; conditioned air is provided by an air handler

Ventilation in this dwelling unit is provided by an Energy Recovery Ventilator; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake; conditioned air is provided by an air handler
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Ventilation in this unit is provided by an Energy Recovery Ventilator; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake; conditioned air is provided by an air handler and dehumidification is provided separately

Ventilation in this unit is provided by an Energy Recovery Ventilator; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake; conditioned air is provided by an air handler and dehumidification is provided separately
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Ventilation inlet does not terminate high enough above the roof deck

Ventilation inlet does not terminate high enough above the roof deck
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Ventilation inlet is appropriately located above grade

Ventilation inlet is appropriately located above grade
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Ventilation inlet is greater than 10 ft. from known contamination source

Ventilation inlet is greater than 10 ft. from known contamination source
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Ventilation inlet is greater than 10 ft. from known contamination source

Ventilation inlet is greater than 10 ft. from known contamination source
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Ventilation inlet is not near any exhaust outlets/contamination sources and is at least 2 ft. above the roof deck

Ventilation inlet is not near any exhaust outlets/contamination sources and is at least 2 ft. above the roof deck
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Ventilation inlet is too close to exhaust outlets and does not extend at least 2 ft. above the roof deck

Ventilation inlet is too close to exhaust outlets and does not extend at least 2 ft. above the roof deck
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Ventilation inlet is too close to the ground and is being blocked by the grass

Ventilation inlet is too close to the ground and is being blocked by the grass
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Ventilation tied into the return with a mechanical damper

Ventilation tied into the return with a mechanical damper
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Ventilation tied into the return without a mechanical damper

Ventilation tied into the return without a mechanical damper
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Vents with screens should not be used for clothes dryer exhaust ducts because the screen can easily get clogged with dryer lint and stop air flow

Vents with screens should not be used for clothes dryer exhaust ducts because the screen can easily get clogged with dryer lint and stop air flow
Case Study:

Veridian Homes: Cold Climate Region 40+% Energy Savings

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Verify that the chimney pillow is friction fit and will stay in place on its own to stop drafts in the chimney; let bag straps hang down for easy removal of the bag when you want to light a fire.

Verify that the chimney pillow is friction fit and will stay in place on its own to stop drafts in the chimney; let bag straps hang down for easy removal of the bag when you want to light a fire.
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Version 3.0: Exhibit 1 ENERGY STAR Reference Design Home - Windows (Revision 9)

Version 3.0: Exhibit 1 ENERGY STAR Reference Design Home - Windows (Revision 9)
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Version 3.1: Exhibit 1 ENERGY STAR Reference Design Home - Windows (Revision 9)

Version 3.1: Exhibit 1 ENERGY STAR Reference Design Home - Windows (Revision 9)
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Vertical (buoyant) flood force; buoyancy forces are drastically reduced for open foundations (piles or piers).

Vertical (buoyant) flood force; buoyancy forces are drastically reduced for open foundations (piles or piers).
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Vertical service shafts and trash chutes are isolated from corridors in multistory buildings by locating them within the vestibules

Vertical service shafts and trash chutes are isolated from corridors in multistory buildings by locating them within the vestibules