Heat recovery ventilation. The warm moist outgoing air gives up some of its ener...

		PoachedSausage on Sept 1, 2017 \| parent \| context \| favorite \| on: Simple Techniques for Lowering the Cost of Zero-En... Heat recovery ventilation. The warm moist outgoing air gives up some of its energy to warm the incoming air. https://en.wikipedia.org/wiki/Heat_recovery_ventilation