Abstract
The article considers a mathematical model of air infiltration through cracks in building envelopes. Air movement for the given flow diagram of a continuous medium is described by the Navier - Stokes equations. As applied to thin layers of the air, assumptions are made that make it possible to compose a system of equations, including equations of dynamics and equations of continuity. The results of assessing the physical deterioration of residential buildings constructed according to standard designs taking into account their number of storeys and wall materials are presented. The influence of various damage to the building on the state of its heat balance is considered. The dependences of reducing thermal protection of building envelopes on the degree of wear in houses made of various materials are revealed. The main recommendations for improving the energy efficiency of buildings are proposed, which allow minimizing heat losses and ensuring comfortable microclimate parameters in the premises.
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