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Cover the box with insulation

Batt Insulation for Existing Vented Attics

Guide describing how to increase insulation in existing homes by installing batt insulation on the ceiling plane of a vented attic.

Blown Insulation for Existing Vented Attic

Guide describing how to insulate a vented attic in an existing home using blown insulation added to the attic floor.

Insulated whole-house fan cover

Publication Date

Mon, 03/01/1999 - 12:00

Spray Foam Insulation Applied to Existing Attic Floor

Guide describing how to apply spray foam insulation to ceilings in existing homes.

Below Deck Spray Foam Insulation for Existing Roofs

Guide describing how to add spray foam insulation to the underside of the existing roof deck as part of the conversion of a vented attic to an unvented, insulated attic.

Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck

Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.

Wrong – Whole house fan installed without an insulated cover

Publication Date

Fri, 10/28/2011 - 12:00

Air seal and insulate around the exhaust fan with a rigid foam box

Some whole-house fans use an automatic insulated cover achieve high R-values when the fan is not in use

Publication Date

Mon, 08/22/2022 - 12:00

This whole house fan is suspended from rafters and connected to the intake grille by a curved insulated duct, greatly reducing vibration and noise in the occupied space

Publication Date

Sat, 01/01/2022 - 12:00

Right - This ceiling-mounted mini whole-house fan has built-in insulated covers to reduce heat loss when the fan is not in use

Publication Date

Sat, 10/01/2011 - 12:00

Right – The HVAC unit installed in the insulated attic uses a heat pump to provide heating and cooling while also providing dehumidification and fresh air ventilation.

Publication Date

Thu, 09/30/2021 - 12:00

Air Sealing Bathroom and Kitchen Exhaust Fans

Guide describing how to air-seal bathroom and kitchen exhaust fans.

Designing Houses That Keep Their Cool

Author(s)

Wilson Alex

Organization(s)

Green Building Advisor

Publication Date

July, 2013

Article from Green Building Advisor on strategies to take when building homes to reduce the need for air conditioning, including insulation, windows, site selection, and roofing.

Cover the box with insulation

Batt Insulation for Existing Vented Attics

Blown Insulation for Existing Vented Attic

Insulated whole-house fan cover

Spray Foam Insulation Applied to Existing Attic Floor

Below Deck Spray Foam Insulation for Existing Roofs

Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck

Wrong – Whole house fan installed without an insulated cover

Air seal and insulate around the exhaust fan with a rigid foam box

Some whole-house fans use an automatic insulated cover achieve high R-values when the fan is not in use

This whole house fan is suspended from rafters and connected to the intake grille by a curved insulated duct, greatly reducing vibration and noise in the occupied space

Right - This ceiling-mounted mini whole-house fan has built-in insulated covers to reduce heat loss when the fan is not in use

Right – The HVAC unit installed in the insulated attic uses a heat pump to provide heating and cooling while also providing dehumidification and fresh air ventilation.

Air Sealing Bathroom and Kitchen Exhaust Fans

Designing Houses That Keep Their Cool

Whole-House Fans

Radon Fan

Attic Ventilation Fans

Air Seal HVAC Cabinet Seams

Bathroom Exhaust Fans

Infiltration meets ACH50 requirements

Mechanical Ventilation for Attached Garage

Kitchen Exhaust Retrofit Duct Guide

Whole House Ventilation Strategies for Existing Homes

Pre-Retrofit Assessment of Ventilation Systems

Enclosure Leakage Test

Whole-House Ventilation Strategies for New Homes