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Right - Example of a small through-the-wall HRV duct unit; 1 of 14.

Right - Example of a small through-the-wall HRV duct unit; 1 of 14.

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Right - A hole is drilled into the wall for installation small through-the-wall HRV; 5 of 14.

Right - A hole is drilled into the wall for installation small through-the-wall HRV; 5 of 14.

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Right - A small through-the-wall HRV duct is installed in an exterior wall; 7 of 14.

Right - A small through-the-wall HRV duct is installed in an exterior wall; 7 of 14.

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Right - An EPDM gasket is installed around an HRV duct installed in an exterior wall; 9 of 14.

Right - An EPDM gasket is installed around an HRV duct installed in an exterior wall; 9 of 14.

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Right - A hand saw is used to remove wall material for a small through-the-wall HRV; 6 of 14.

Right - A hand saw is used to remove wall material for a small through-the-wall HRV; 6 of 14.

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Right - Flaps are cut into house wrap installed over an HRV duct then taped out of the way to install flashing; 8 of 14.

Right - Flaps are cut into house wrap installed over an HRV duct then taped out of the way to install flashing; 8 of 14.

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Air Sealing Colorado Homes – 10.634

Reference

Fact sheet describing air-sealing concerns and remedies, including HRV/ERV installation, caulking, spray foam, and weatherstrip installation.

Condensation Control for Walls in Cold Weather

Guide

Guide describing ways to construct wall assemblies in cold climates to minimize the likelihood of condensation formation inside the walls.