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Guides A-Z

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

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.