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Day temperature around 0<br />
Celcius degrees<br />
Climate<br />
winter<br />
Fan to warm up<br />
the building<br />
warm tap water<br />
electricity<br />
heated air<br />
Inlet for the fan<br />
to reheat the<br />
cooled down air.<br />
The low sun during the<br />
winter radiates through<br />
the facade and heats up<br />
the thermal mass.<br />
Ground heat exchanger to<br />
warm the cold outside air to 14<br />
Celsius degrees through pipes<br />
in the earth.