Part form an adequate roof

An aluminium tin with inlaid pipes similar to a floor heating. The roof delivers heat in the summer. The roof is kept snow free in winter. Above the photovoltaic.

Part form an adequate roof An aluminium tin with inlaid pipes similar to a floor heating. The roof delivers heat in the summer. The roof is kept snow free in winter. Above the photovoltaic.

So this roof fulfills the minimal requirments. Just right now 99.9999% of the roofs in Germany are below.the minimal requirments.
index: 2006 2006 
Index: Photovoltaic Photovoltaic top 
Index: Photovoltaic - Electric power direct from light Photovoltaic 
Index: Photovoltaic and heat combined PV + heat combined 


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