Free tools
Four public calculators, no account: U-value, Glaser condensation, estimated energy class and thermal bridges.
U-value calculator
Thermal transmittance U of a wall, roof or floor.
Glaser condensation calculator
Surface or interstitial condensation, on the layers you pick.
Estimated energy class
Indicative class of a building from its primary energy, on the Mc 001-2022 scale.
Thermal bridges: f_Rsi
The f_Rsi factor of an element and the yearly loss through a linear bridge.
Working on an energy certificate?
The ZEPHREN calculation software follows Mc 001-2022 and has a trial without a card.