Considering the building options with a collector built into the facade or roof, the cost of its installation can not be taken into account, since they are comparable with the cost of installing that part of the facade or roof, which will be replaced by the collector.
The collector is glazed, which serves as an external coating, there is a set of joint insulation, thermal insulation and waterproofing, supporting support elements are built -in, only the absorber of the solar manifold is required to add. In other words, the cost of the absorber will be an additional cost if the cost of the cost of the corresponding elements of the collector and the cost of the elements replaced by them, as well as the cost of installation.
Having summarized all of the above, it follows that by buying and installing equipment for the production and use of heat, we take only the first step on the acquisition of a certain amount of heat in installments, which is planned to be obtained for the entire service life of such equipment.
The second value will be a monthly payment for the electricity consumed and for equipment maintenance. Moreover, the second value in the future will undergo some change. Having made all the costs from which both components are consistent and divided them into the amount of heat, which we receive for the entire service life of the equipment, you get an average specific cost of heat.