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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
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Taping polyethylene sheeting at interior pier footings

Taping polyethylene sheeting at interior pier footings
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Target Ventilation, Formula 4.1a from ASHRAE 62.2-2010

Target Ventilation, Formula 4.1a from ASHRAE 62.2-2010
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Technology Solutions Case Study: Combustion Safety for Appliances Using Indoor Air

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Technology Solutions Case Study: Combustion Safety Simplified Test Protocol

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Technology Solutions Case Study: Complete and Fully Aligned Air Barrier

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Technology Solutions Case Study: Design Guidance for Passive Vents in New Construction, Multifamily Buildings

Case Study:

Technology Solutions Case Study: Evaluation of Passive Vents in New-Construction Multifamily Buildings

Case Study:

Technology Solutions Case Study: Field Performance of Inverter-Driven Heat Pumps in Cold Climates

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Technology Solutions Case Study: Properly Sized and Located Return Air Inlets

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Technology Solutions Case Study: Sealed Air-Return Plenum Retrofit

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Technology Solutions Case Study: Sealed Crawl Space with Integrated Whole-House Ventilation in a Cold Climate

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Technology Solutions Case Study: Selecting Ventilation Systems for Existing Homes

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Technology Solutions Case Study: Ventilation System Effectiveness and Tested Indoor Air Quality Impacts

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Test the thermostat fan, cool, and heat settings

Test the thermostat fan, cool, and heat settings
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The “old” exhaust fan vent on the right was installed before or during the siding installation and is likely properly flashed- the “new” exhaust fan on the left was installed after the siding was installed and relies on caulking to keep water out

The “old” exhaust fan vent on the right was installed before or during the siding installation and is likely properly flashed- the “new” exhaust fan on the left was installed after the siding was installed and relies on caulking to keep water out
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The air filter slot on this air handler has no cover.

The air filter slot on this air handler has no cover.
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The air filter slot on this furnace is covered with a magnetic seal.

The air filter slot on this furnace is covered with a magnetic seal.
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The air intake or exhaust grilles in this second-story soffit will be very difficult to safely access to measure airflow

The air intake or exhaust grilles in this second-story soffit will be very difficult to safely access to measure airflow
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The below-grade wall assembly includes dampproofing, draining details, and insulation.

The below-grade wall assembly includes dampproofing, draining details, and insulation.
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The elevator shaft in this multistory multifamily building has an exhaust fan that maintains a slight negative pressure to control odors; there is also a smoke vent that is dampered closed during normal conditions.

The elevator shaft in this multistory multifamily building has an exhaust fan that maintains a slight negative pressure to control odors; there is also a smoke vent that is dampered closed during normal conditions.
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The energy recovery ventilator operates continuously to provide clean fresh air throughout the home.

The energy recovery ventilator operates continuously to provide clean fresh air throughout the home.
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The gap between the air filter and the return duct opening has been sealed with tape that will stop air flow but is easily pulled off or cut through when the filter needs to be replaced.

The gap between the air filter and the return duct opening has been sealed with tape that will stop air flow but is easily pulled off or cut through when the filter needs to be replaced.