HRV ~ Air Exchangers
Today's new constructions are built to be heated with the most efficiency possible. The insulation and air-tight constructions are made to keep the houses warm, so that the heating cost will be at its lowest. But there is a side effect to this system ~ the ambient air is held inside, keeping at the same time, all the humidity and the pollutants inside as well.

Working with your hot air heating system, the air exchanger evacuates the humidity and the air pollutants outside, and in the same time it retains thewarmth to heat the outside air coming in.

In this process there is no heat- loss.