Detailed information on microclimate of premises, factors of environmental impact on buildings, noise of building microclimate support systems and methods of its elimination, on jet currents in premises are proposed. Methods of calculation of engineering systems characteristics are given. The most rational directions of energy saving implementation at provision of microclimate in premises of buildings are presented, indicators of economic efficiency of energy saving measures are presented. For students, specialists and engineers, researchers and scientists involved in the design and effective operation of building climate support systems.