W/(m²·°C)

watt per square meter Celsius

Heat transfer coefficientexact by definition

The watt per square meter Celsius is exactly equal to the watt per square meter kelvin, and it is the label used on most European glazing and envelope data. A modern double-glazed unit is around 1.2 W/(m²·°C), a triple-glazed one 0.6.

1 W/(m²·°C) 1 W/(m²·K)