Heating, Ventilation and Air Conditioning is the process of essentially giving the space a set of lungs. Heating however will not be done through the ventilation system, but instead will use underfloor radiant heating. Ventilation is to bring in fresh air, and expel stale air. This is essentially the lungs of the space. By providing for ventialation, it will also improve the quality of the air, especially when the HVAC system is cleaned every 6 months. Air conditioner. While I don’t know all of the technical details, it would still be worth noting here.