How is the CM value (effective thermal capacity) calculated for a construction?
The CM values are calculated by: For each construction element: Calculate the contribution of each layer of construction as density (kg/m3) x thickness (m) x specific heat capacity (kJ/(kgK)) Starting from the layer of the construction closest to the space add these values together until any one of the following conditions is satisfied: the total thickness of layers exceeds 0.1 m you have reached the mid-point of the constructionyou have reached an insulating layer
