In OUR Country, It is not Customary to Install Special Veneration Systems, The Natural Veneration of the House Is Preferd, Sincy Its the Simplest and Cheapest. Butu in the Cold Season, Such Ventilation Is Still More or Less Effective, The Summer, With Air, the IS No Sense From IT. In Addition, Modern Building Materials and Technologies do not Involve The Implementation of this Type of Ventilation, and Practically Do Not Miss The Air.