Expella’s heat recovery unit helps create a hygienic microclimate in your home. Teamed with the other four principles of the Passive House, it can eliminate the need for heating and see 90% less energy use than the conventional house.

How does Heat Recovery work?

Quite simply it works by extracting stale indoor air and passing it through a heat exchanger before being exhausted outside. Fresh air from outside is then filtered and passed through the heat exchanger, taking on a similar temperature to the air that left the home and then released into the home. It provides clean continual air at a comfortable temperature whilst preventing condensation, mould and helping to stop the spread of germs or build-up of allergens in the household. It has a low energy consumption and quiet operation.