Beside being quiet, the Zehnder HRV is visually discreet. In this video, Skylar of Hammer & Hand takes a walk through the house and shows us the small supply and exhaust ports. He also explains why controlled, balanced ventilation makes sense in any house: Besides saving energy, increasing comfort, and guaranteeing good indoor air quality all year round, it’s really the only way to know where the house’s makeup air is coming from.