Thermal transmittance (Ud):
Ud = thermal transmittance (W/m². K)
Thermal transmittance is a measure for the amount of heat that is able to pass through a door.
The Ud is dependent on:
- the thickness of the material
- the thermal transmittance of the material
- the construction of the doorblade
The lower this number, the less heat is transmitted.
Insulation value Metaflex doors
The thermal transmittance of a Metaflex door is determined by the sum of the thermal transmittance of the doorblade, the sill and the rim.
The size of a door also has an influence on the amount of thermal transmittance. Metaflex has translated this into a bandwidth and has calculated the thermal transmittance for every type of door.