American Society of Heating, Refrigerating, and Air Conditioning Engineers: the people who write the ASHRAE 62.2 Residential Ventilation Standard.

The Heating, Refrigeration, and Air Conditioning Institute of Canada: HRAI is 1300 member organization that provides some excellent ventilation training, particularly focused on HRV/ERVs.

Heyoka Solutions, LLC: parts and tools for residential ventilation.

The Home Ventilating Institute: HVI tests and certifies residential ventilation systems.  Check the HVI Directory for the latest information on all the certified products.

Residential Energy Dynamics: a world of exceptional worksheets and tools.

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