U-value calculator

This insulation calculator is suitable to calculate the thermal transmittance of walls, floors and roofs and constructions adjacent to the ground in accordance with standards EN ISO 6946 and EN ISO 13370. Click here for the previous Silverlight version of the calculator.

Surface resistance calculator

This surface resistance calculator is suitable for calculating the external and internal surface resistance of various wall, slab, roof and floor structures in accordance with EN ISO 6946 standard.