High-level Thermal Insulation

Buildings with high standards in the thermal insulation of walls and windows reduce the energy demand during the annual heating period. Reduction rates of 80 to 90% in relation to the current average heating demand of existing buildings are possible. This "Passive House" standard has been used in many cases in Germany and Austria since the end of the 1990s. This is now also done in cases of retrofitting.

Such buildings with very high energy efficiency in heating are also able to deliver good comfort during heat waves in the summer. Especially when heavy materials with high thermal capacity are use inside the insulating layer the thermal inertness in response to outside temperature changes in summer will be much higher then in "normal" insulated buildings. When in "normal" houses after 2 or 3 days unpleasant indoor temperatures of more than 25°C will be reached after the outside daily maximum was in the range of 35°C and higher, highly insulated houses can resist more then one week in this thermal condition.

Thermal insulation (City of Dresden)