Passive House design build and performance materials technical training videos for the Colorado region. Featuring the best in Energy Recovery Ventilation (Zehnder, Air Pohoda) Pro Clima air barriers with wall systems and thermally broken connection details essential for extremely tight buildings for performance driven goals. MainStream Corporation has built several of the tightest known buildings in the US and is committed to helping owners cost effectively increase health, comfort, and freedom from utility bills. MainStreamCorporation.com