The goal of the Retrofit Simulation study was to show the order of magnitude of the measures to be taken in order to reach the energy demand goal of 30 to 50 kWh/(m²·y) of primary energy for heating, ventilation domestic hot water production and possibly cooling (if needed). With one or more example retrofit buildings, the measures to be taken to reach this goal at different locations in the countries represented in the project are specified and quantified . Measures include:

•   Improved building insulation, including window replacements and additional insulation of opaque surfaces
•   Application of a ventilation system with heat recovery
•   Use of renewable energy sources, especially solar energy for domestic hot water production
•   Improved energy production (by replacement of the heat generation), possibly including electricity production
 

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