How does it work? Ubbink HRV systems recover up to 95% of heat from the extracted stale air by using a counter flow heat exchanger. The outgoing and incoming air pass next to each other but do not mix ...

A fan is used to bring in outside air, passing it through a heat exchanger made of alternating panels of coroplast. (See diagrams of his setup after the break) This is really a simple design ...

Using a heat exchanger within the appliance, HRV extracts the heat from the outgoing air as it passes over metal plates and uses this to warm incoming cold air. In warmer months, the heat recovery ...