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Guides A-Z

Guide describing how to properly test the air barrier between the garage and house, and how to ensure the air barrier is tight enough to prevent garage air from entering the home.

Guide describing how to conduct a home performance assessment before beginning retrofit projects in existing homes.

Guide describing how to install an exhaust fan in an attached garage to pull fumes out of the garage and to depressurize the garage with reference to the home.

Information guide describing how to assess attics, ceilings and roofs before proceeding with upgrades in existing homes.

Retrofit guide describing how to assess harmful gasses such as carbon monoxide, sulfur oxides, nitrogen oxides, and soot from existing combustion appliances.

Information guide describing how to assess crawlspaces and basements before proceeding with upgrades in existing homes.


Information guide describing pre-retrofit actions to take to assess for asbestos, volatile organic comounds (VOCs) soil gasses including radon and lead.

Guide describing how to evaluate existing ventilations systems before performing home upgrades.

Information guide describing how to perform a thorough visual evaluation of walls, windows and doors before proceeding with renovation projects.

Guide describing how to install a radon mitigation fan with various types of house foundations.

Guide describing how to install a radon-mitigating vertical ventilation pipe in existing homes with various types of house foundations.