This main report summarized the content of the three sub-report of the project, including the background for the project, the potentails for saving heat and the barriers for implementing these savings. Afterwards the report define the geographical area considered, as well as the present situation and policy. An action program is suggested. It includes the establishing of a Heat Saving Trust, somehow along the same lines as the present Electricity Saving Trust. Another action element is a tightening of the building codes for new houses. Also the local authorities should be engaged in the action plan, and finally education and information campagnes should be applied.