The contracting authority will establish, via this competition, a long term contract for the delivery of water borne heating to existing and new buildings located in Bjørkelangen in Aurskog-Høland municipality. The tenderer shall be responsible for the delivery of both basic and peak load. Most of the heating shall be produced as bioenergy based on wood chippings and the renewable share from wood chippings and possibly the sun shall be a minimum of 85 %.