Caluwin is an app for calculating U-values of windows according to DIN EN ISO 10077 and DIN EN13947. Features: - Uw-values of windows according to DIN EN ISO 10077-1 - Condensation calculator - Surface temperatures and condensation risk in the glass edge area - Window Energy Savings Winter - Window Energy Savings Summer - Window Energy Savings Winter + Summer - Window Energy Ratings Switzerland, Denmark, France, UK - Passive House Efficiency - SWS Air Simulation (lifetime, elevat