Heat flux & transfer coefficient

U-valueU

Thermal transmittance: watts per square metre-kelvin.

Definition record

How this unit is defined

Canonical base

1 U = 1 U

Conversion type

linear

Historical notes

The reciprocal of the R-value; converted via context.

Aliases

U value, W/(m²·K), thermal transmittance

Same dimension

Every conversion routes through the canonical base of the dimension.

1 U = 1 U

Exact relationship

10 U = 10 U

Exact relationship