Strategy insulate the exterior

For non-historic buildings, exterior insulation is the standard solution, but to insulate to the PH Standard is advanced. The apartment building, Hoheloogstrasse in Ludwigshaven, is an example of an extreme renovation (figure 2). Wall, roof and the basement ceilings received 20, 24 and 12 cm of insulation. Windows were replaced with PH-quality units, thermal breaks were eliminating and mechanical ventilation with heat recovery added. As a result, the annual heating energy demand was reduced from 250 to 15 kWh/m2. After stripping the building to its structure, it was possible to integrate heat recovery ventilation and construct modern, spacious apartments. Finally, PV was integrated into the entire south-facing roof [3].

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