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Installation
*INSTALLATION*
81
U value
Plug&Play operation is possible in younger or renovated buildings. If the adjacent
wall or the floor is in contact with the ground or the outside air, it must have a heat
transfer coefficient (U value) of ≤ 0.5W/(m²K).
Material Material thickness U value(as of 1995)
Solid wall
(vertical coring brick, floating brick or com-
parable porous or highly perforated materi-
als)
≥ 30cm 0.5
Solid timber wall
(e.g. log cabin/prefabricated house). Timber
frame or timber panel wall with insulating
filling
– 0.4
Passive house
(KfW 55, 40, 40 Plus)
– 0.15–0.2
The U values for other materials can be found on the websites of the German Fed-
eral Ministry for Economic Affairs and Climate Action and the German Federal Min-
istry of the Interior and Community.
If you have any other questions about your building, please contact a construction
expert or energy adviser.
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