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This central ventilation system uses an energy recovery ventilator, pre-conditioning unit, and elevator shaft exhaust fan to supply air to dwelling units and corridors and to exhaust air from units and the elevator shaft in a multifamily building

This central ventilation system uses an energy recovery ventilator, pre-conditioning unit, and elevator shaft exhaust fan to supply air to dwelling units and corridors and to exhaust air from units and the elevator shaft in a multifamily building
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This energy recovery ventilator (ERV) provides balanced ventilation to a dwelling unit in a multifamily building

This energy recovery ventilator (ERV) provides balanced ventilation to a dwelling unit in a multifamily building
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This fresh air intake filter box provides for access to a replaceable filter for air intake duct with a 6-inch collar.

This fresh air intake filter box provides for access to a replaceable filter for air intake duct with a 6-inch collar.
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This furnace filter has become very clogged with dust and needs to be replaced.

This furnace filter has become very clogged with dust and needs to be replaced.
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This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home

This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home
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This is the ceiling vent for a basic bathroom exhaust fan

This is the ceiling vent for a basic bathroom exhaust fan
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This kneewall has no top plate and the resulting gap provides a wide-open pathway for air and vapor to travel between the living space and the attic

This kneewall has no top plate and the resulting gap provides a wide-open pathway for air and vapor to travel between the living space and the attic
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This multistory stairwell has an automatic damper that is integrated with the engineered smoke control system.

This multistory stairwell has an automatic damper that is integrated with the engineered smoke control system.
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This narrow bottle brush was an effective tool for removing the debris between the blades of this bathroom exhaust fan

This narrow bottle brush was an effective tool for removing the debris between the blades of this bathroom exhaust fan
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This new filter is inserted into furnace filter slot on the return side of the furnace with the arrow on the side of the filter frame pointing in the direction of airflow, which is toward the furnace.

This new filter is inserted into furnace filter slot on the return side of the furnace with the arrow on the side of the filter frame pointing in the direction of airflow, which is toward the furnace.
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This plan view of a multifamily building shows how a leaky central exhaust system can create negative pressure zones, pulling unconditioned outside air or humid inside air into the service shaft and wall cavities

This plan view of a multifamily building shows how a leaky central exhaust system can create negative pressure zones, pulling unconditioned outside air or humid inside air into the service shaft and wall cavities
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This shared parking garage in a multistory multifamily building is open to the exterior, allowing for natural air changes to control airborne contaminant concentration.

This shared parking garage in a multistory multifamily building is open to the exterior, allowing for natural air changes to control airborne contaminant concentration.
Presentation:

Three’s A Crowd: Energy Efficiency, Humidity and Ventilation in Humid Climate Zones

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Threshold Sweep Flashing protects the door and helps to keep out wind-driven rain.

Threshold Sweep Flashing protects the door and helps to keep out wind-driven rain.
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Time series of concentrations of particles measured by ten different devices in the same location, demonstrating a failure to quickly and properly return to baseline after a high concentration event.

Time series of concentrations of particles measured by ten different devices in the same location, demonstrating a failure to quickly and properly return to baseline after a high concentration event.
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To get an average whole-wall R value of R-19 with double-pane windows, you’d need R-330 of wall insulation; triple-pane windows can achieve an R-19 total wall R Value with R-38 of insulation

To get an average whole-wall R value of R-19 with double-pane windows, you’d need R-330 of wall insulation; triple-pane windows can achieve an R-19 total wall R Value with R-38 of insulation
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To test bathroom exhaust fan airflow, hold a tissue up to the fan while it is running; if it holds, airflow is good.

To test bathroom exhaust fan airflow, hold a tissue up to the fan while it is running; if it holds, airflow is good.
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To test house-to-garage airtightness, after connecting the green tubing as shown, connect the red tubing as follows: connect the input tap on channel “A” of the two-channel manometer (2CM) to the reference tap on channel “B” of the 2CM

To test house-to-garage airtightness, after connecting the green tubing as shown, connect the red tubing as follows: connect the input tap on channel “A” of the two-channel manometer (2CM) to the reference tap on channel “B” of the 2CM
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To test house-to-garage airtightness, first set up the blower door kit with the smart manometer in the blower door

To test house-to-garage airtightness, first set up the blower door kit with the smart manometer in the blower door
Video:

Transfer Grilles (1)

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Triple-Pane windows can be used as a tradeoff for continuous wall insulation or stricter air sealing targets when showing compliance with the 2021 IECC using the UA path

Triple-Pane windows can be used as a tradeoff for continuous wall insulation or stricter air sealing targets when showing compliance with the 2021 IECC using the UA path
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Triple-pane windows use three panes of glass separated by gaps filled with krypton or argon gas, insulated spacers, and low-emissivity coatings to achieve high insulation performance

Triple-pane windows use three panes of glass separated by gaps filled with krypton or argon gas, insulated spacers, and low-emissivity coatings to achieve high insulation performance
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Two manometers are used when pressure testing the airtightness of the walls separating the house from an attached garage

Two manometers are used when pressure testing the airtightness of the walls separating the house from an attached garage
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Types of window attachments include exterior attachments such as storm windows, fixed awnings, dynamic awnings, roller shutters, roller shades, and solar screens, and interior attachments such as drapes, louvered blinds, roller shades, surface applied fil

Types of window attachments include exterior attachments such as storm windows, fixed awnings, dynamic awnings, roller shutters, roller shades, and solar screens, and interior attachments such as drapes, louvered blinds, roller shades, surface applied films, cellular shades, and window quilts.