VENTILATION SYSTEM FOR BUILDING Russian patent published in 1995 - IPC

FIELD: ventilation systems. SUBSTANCE: arranged above supply fan is exhaust shaft to which supply and exhaust air ducts are connected respectively; air ducts are arranged in parallel with cover of building. Air ducts have common heat exchange wall provided with perforations whose total area is equal to 1/3 of cross sectional area of supply air duct. Exhaust air duct is provided with side walls extending over half its length. Heat exchange wall is streamlined longitudinally and transversely. Supply air duct is provided with central and peripheral longitudinal passages of unequal cross-section. Area of section in central passages is less than that in peripheral ones. Supply air duct is provided with side chutes on its lower wall for accumulation of condensate and transverse fins inclined towards chutes and brought in communication with them by means of vertical pipe lines and condensate collecting reservoirs. EFFECT: enhanced reliability. 4 dwg