The use of energy-efficient materials (heat insulators) in the construction and renovation of buildings and structures is a key factor affecting the heat balance of the building (minimizing heat loss through the building enclosing structures). It is known that reducing the cost of heating (the consumption of heat or thermal energy) is an important technical and energy problem, especially for the conditions of the northern regions. The main way to save energy is to insulate enclosing structures, in particular, walls. However, a compromise between reducing the heat loss of a building and the economic efficiency of energy-saving measures is important. This article describes the method of justifying the dependence of the cost of heaters on their technical characteristics, based on a statistical analysis of price and thermal characteristics, used later in the development of optimization models for the selection and use of heaters.