Air Trapped In Radiant Floor

Air is the worst thing that can happen to any hydronic radiant heating system.

Air trapped in radiant floor. Central heating systems use either a furnace with hot air ducts or a boiler with hot water hydronic pipes and radiators including radiant under floor heat. Thus creating a vacuum this will suck air into the system. If pressure is dropping below the 15 psi it is an indication of air still trapped in your system. Why the legalett radiant floor system works.

In the summer it can also be used to cool the floor. Fortunately it s an easy problem to solve and won t become an issue at all if care is taken during the initial filling process. It is a closed loop system where air is moved through either 2 or 4 inch pvc tubes which are non corrosive so that no dust from the air in the home is introduced into the system. When water is heated in a hydronic heating system also known as a hot water heating system dissolved air is driven out.

You will need one or two wall mounted fan coils in order to keep the humidity low enough so that no condensation occurs on the floor air dew point floor temp. Legalett air heated radiant floor heating systems are entirely embedded in concrete including the heater box. The closed system expansion tank is pre charged and should not need any pressure. But much of the sensible cooling will be done by the radiant floor.