In Floor Heating Water Temperature

Typical radiant floor systems operate at 85 125 f water temperature entering the tubing and put the floor surface temperature about 5 degrees above the room thermostat set temperature.

In floor heating water temperature.

The other consider ation is. Heating systems so that they can provide design load heat output using a supply water temperature no higher than 120ºf. This suggested criterion is based on the fact that the distribution piping and heat emitters in a well planned. But standby losses for six months out of every year can add up.

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. Even lower supply water temperatures should be used when possible. Heat losses to below grade. Building systems and materials.

As warm water circulates through the tubing or as electricity warms the heating elements the concrete flooring turns into an efficient inconspicuous radiator. The down side is two heat sources. Some types of heat emitters are best suited for relatively high temperature heat sources. 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. When floors are conditioned within this range most people wearing normal footwear will enjoy having their feet on the floor. Granted the unit dedicated to heat ing the floor only wastes heat during the winter months. Typically radiant heating systems warm floors to temperatures of 75 to 80 degrees f.

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.