Swegon: polyvalent units and heat recovery is growing in colder climates

In recent years, heat recovery has become an increasingly more common and desirable functionality in units for ventilation, heating and cooling (HVAC). The general idea is to recover as much as possible of the energy that has already been “spent” for heating or cooling, and use that energy again and again. But what if it is not only used repeatedly in one place when needed, but also in other parts of an HVAC system and no matter the outdoor conditions?