In this article the type of a design of VF which allows to create indoors a favorable microclimate with necessary illumination, is considered by temperature, moisture conditions and the movement of air, protecting thus from negative atmospheric actions.High heat-shielding properties are considered to be one of the main reasons for the use of ventilated facades in modern construction. The scheme of a design, its advantage is also provided and the factors influencing removal of moisture from an air gap of a facade are investigated.From the point of view of physics in an air interval, due to difference of temperatures and pressure, air circulation is carried out. Effectively to remove moisture, it is necessary to have the average speed of the movement of air within 0.5-1 m/s. At observance of technology indicators of moisture-proofness of facades improve, temperature fluctuations are leveled, normal functioning of all system in general is provided. Despite a set of advantages of this type of facades take place and some shortcomings therefore the obtained data indicate the need of further research of systems of the ventilated glass facades and work on elimination of the revealed shortcomings. Thus, a quantitative calculation of parameters of an air gap is of great importance in the design of a multilayer building envelope.