Heat of the earth tube previously, a heat pump took only heat from the previously and never gave heat. Cooling the photovoltaic constrains to store the excess heat in the garden.  

Heat of the earth tube

previously, a heat pump took only heat from the previously and never gave heat. Cooling the photovoltaic constrains to store the excess heat in the garden.

index: 2006 2006 
Index: Heat pump Heat pump 
Index: Heat of the earth for heating Heat of the earth 


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