In Floor Heating Water Temperature

According to ashrae the american society of heating refrigerating and air conditioning engineers a floor temperature that creates optimal human comfort for most people lies just about at 75 f as shown in this graph.

In floor heating water temperature.

Heating systems so that they can provide design load heat output using a supply water temperature no higher than 120ºf. Typically radiant heating systems warm floors to temperatures of 75 to 80 degrees f. Building systems and materials. For example the familiar finned tube baseboard convectors used in many residential and light commercial buildings work well with water temperatures above 150 f but not with low temperature systems such as ground source heat pumps see table matching the components.

But standby losses for six months out of every year can add up. When floors are conditioned within this range most people wearing normal footwear will enjoy having their feet on the floor. Even lower supply water temperatures should be used when possible. As warm water circulates through the tubing or as electricity warms the heating elements the concrete flooring turns into an efficient inconspicuous radiator.

With underfloor cooling condensation may collect on the surface of the floor. To prevent this air humidity is kept low below 50 and floor temperatures are maintained above the dew point 19 c 66f. Heat losses to below grade. All water heaters waste heat energy even when the burner is off and the unit is sitting idle between heat ing cycles.

This suggested criterion is based on the fact that the distribution piping and heat emitters in a well planned. Granted the unit dedicated to heat ing the floor only wastes heat during the winter months. The other consider ation is. Radiant floor heating and hardwood floors humans appreciate floors temperatures that are controlled to above 66 f 19 c in cooling and below 84 f 29 c in heating.

The down side is two heat sources.