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Airflow can be directed across thermal mass in the ceiling, floor, or elsewhere inside the home through various window and louver configurations

Airflow can be directed across thermal mass in the ceiling, floor, or elsewhere inside the home through various window and louver configurations
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All of the exhaust fans are wired to one labeled switch at the electrical panel

All of the exhaust fans are wired to one labeled switch at the electrical panel
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An elevator shaft vent with a motorized damper in a multistory multifamily building provides smoke and hot gas control in an elevator shaft during fire events; during normal operation the damper remains closed to reduce energy loss.

An elevator shaft vent with a motorized damper in a multistory multifamily building provides smoke and hot gas control in an elevator shaft during fire events; during normal operation the damper remains closed to reduce energy loss.
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An energy recovery ventilator (ERV) transfers both heat and moisture between incoming and outgoing streams of air

An energy recovery ventilator (ERV) transfers both heat and moisture between incoming and outgoing streams of air
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An energy recovery ventilator draws in fresh outside air that is filtered and circulated by the central air handler, while stale air from central returns is routed through the ERV to exchange heat before being exhausted outside.

An energy recovery ventilator draws in fresh outside air that is filtered and circulated by the central air handler, while stale air from central returns is routed through the ERV to exchange heat before being exhausted outside.
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An energy recovery ventilator provides filtered fresh air to every room in the house.

An energy recovery ventilator provides filtered fresh air to every room in the house.
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An energy recovery ventilator with a MERV 13 filter supplies clean, fresh air to the entire home.

An energy recovery ventilator with a MERV 13 filter supplies clean, fresh air to the entire home.
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An ERV provides fresh air to the home while removing stale air and recovering heat.

An ERV provides fresh air to the home while removing stale air and recovering heat.
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An HRV or ERV provides balanced ventilation

An HRV or ERV provides balanced ventilation
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An in-line airflow station installed in rigid duct provides a location to measure ventilation airflow

An in-line airflow station installed in rigid duct provides a location to measure ventilation airflow
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An in-line exhaust fan supplements the ability to exhaust moisture-laden air and lint from a dryer

An in-line exhaust fan supplements the ability to exhaust moisture-laden air and lint from a dryer
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An oil-fired boiler with direct combustion air and exhaust venting

An oil-fired boiler with direct combustion air and exhaust venting
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Anemometers, including the vane style (lower) and hotwire style (upper) are used to measure air velocity to calculate airflow

Anemometers, including the vane style (lower) and hotwire style (upper) are used to measure air velocity to calculate airflow
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Assembled section of fiber board duct

Assembled section of fiber board duct
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Attach a strong permanent cover to gable end vents before a severe storm strikes to prevent moisture intrusion.

Attach a strong permanent cover to gable end vents before a severe storm strikes to prevent moisture intrusion.
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Attic ventilation fans exhaust hot air from the attic while replacing it with cooler air from the outside through intake vents

Attic ventilation fans exhaust hot air from the attic while replacing it with cooler air from the outside through intake vents
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Average wet-bulb temperatures across the United States

Average wet-bulb temperatures across the United States
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Backdraft Dampers

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Baffles allow ventilation under roof decking while keeping wind from blowing insulation back from the edges of an attic.

Baffles allow ventilation under roof decking while keeping wind from blowing insulation back from the edges of an attic.
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Balanced ventilation dominates ventilation specifications by Zero Energy Ready Home builders

Balanced ventilation dominates ventilation specifications by Zero Energy Ready Home builders
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Balanced ventilation strategy for conditioned attic spaces

Balanced ventilation strategy for conditioned attic spaces
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Bathroom exhaust fans are timer-operated to encourage removal of moisture from the home.

Bathroom exhaust fans are timer-operated to encourage removal of moisture from the home.
Case Study:

Baxter Community - High Performance Green Building

Baxter Community - High Performance Green Building
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Be Hurricane Ready: Secure Soffits