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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 STAR logo indicates products that have been verified to meet energy efficiency and performance criteria.

The ENERGY STAR logo indicates products that have been verified to meet energy efficiency and performance criteria.
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The ENERGY STAR logo on the manufacturer’s label indicates this is an ENERGY STAR qualifying exhaust fan

The ENERGY STAR logo on the manufacturer’s label indicates this is an ENERGY STAR qualifying exhaust fan
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The goal of foundation moisture management is to construct the basement, crawlspace, or slab in a way that keeps moisture from getting in in the first place

The goal of foundation moisture management is to construct the basement, crawlspace, or slab in a way that keeps moisture from getting in in the first place
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The icicles and the bare spot along the left roof ridge indicate that heat from the second-story room may be heating the underside of the roof deck, melting the snow and likely leading to ice dam formation.

The icicles and the bare spot along the left roof ridge indicate that heat from the second-story room may be heating the underside of the roof deck, melting the snow and likely leading to ice dam formation.
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The individual exhaust systems for each dwelling unit in this multifamily building result in large numbers of penetrations in the exterior façade

The individual exhaust systems for each dwelling unit in this multifamily building result in large numbers of penetrations in the exterior façade
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The manufacturer’s label found on this exhaust fan housing shows a sone rating of 1.0

The manufacturer’s label found on this exhaust fan housing shows a sone rating of 1.0
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The national risk of winter weather in the United States as of 2023.

The national risk of winter weather in the United States as of 2023.
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The Permafrost Investigation

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The polyethylene ceiling vapor barrier is sealed to form an air barrier around the exhaust fan in this very cold climate location (≥ CZ 6).

The polyethylene ceiling vapor barrier is sealed to form an air barrier around the exhaust fan in this very cold climate location (≥ CZ 6).
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The trash chute and trash room in a multistory multifamily building are depressurized with exhaust fans to minimize odors.

The trash chute and trash room in a multistory multifamily building are depressurized with exhaust fans to minimize odors.
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The ventilation space in this vented over-roof keeps the roof cool to prevent ice dams over the unvented attic

The ventilation space in this vented over-roof keeps the roof cool to prevent ice dams over the unvented attic
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These ERV/HRV configurations are NOT recommended because outdoor air can be sucked back into the ERV/HRV before being distributed to the living space

These ERV/HRV configurations are NOT recommended because outdoor air can be sucked back into the ERV/HRV before being distributed to the living space
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These interior storm windows have low-emissivity coatings to let in light while keeping out heat in the summer and keeping heat in in the winter

These interior storm windows have low-emissivity coatings to let in light while keeping out heat in the summer and keeping heat in in the winter
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These snow guards help to keep snow from sliding off the roof and injuring people below.

These snow guards help to keep snow from sliding off the roof and injuring people below.
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This air handling unit provides outside air at the same rate as the air being exhausted from the bathroom exhaust fan; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake and dehumidification is provided by a separate unit

This air handling unit provides outside air at the same rate as the air being exhausted from the bathroom exhaust fan; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake and dehumidification is provided by a separate unit
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This central ventilation system uses an energy recovery ventilator to supply air to the corridor and exhaust air from the elevator shaft of a multifamily building

This central ventilation system uses an energy recovery ventilator to supply air to the corridor and exhaust air from the elevator shaft of a multifamily building
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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 ducted, wall-mounted range hood exhaust fan replaced a recirculating fan that did not adequately remove kitchen contaminants.

This ducted, wall-mounted range hood exhaust fan replaced a recirculating fan that did not adequately remove kitchen contaminants.
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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 home has heat loss through the roof, leading to ice dam formation and structural issues during winter months.

This home has heat loss through the roof, leading to ice dam formation and structural issues during winter months.
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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 thermal image of an interior storm window shows how much temperature change occurs between the interior storm window panel on the right, at 50F and the existing glass on left at approximately 0F

This thermal image of an interior storm window shows how much temperature change occurs between the interior storm window panel on the right, at 50F and the existing glass on left at approximately 0F
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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