Abstract: An installation for ventilation and heat treatment of air in a building including housing units having living and functional quarters is provided, the installation including an air blowing unit for blowing air taken from outside the building into the living quarters, an extraction unit for extracting air from the functional quarters, ducts communal to the building for conveying air to and extracting air from each housing unit, a blowing duct connected to each housing unit for conveying the blowing air, an extraction duct connected to each housing unit for conveying the extracting air, and an individual thermodynanic unit disposed on the housing unit at the connection of the blowing and extraction, where the blowing air and the extracting air passes over the thermodynamic unit, the thermodynamic unit including an evaporator disposed proximate the blowing flow and a condenser disposed proximate the extracting flow.

Abstract: The invention concerns the installation of a double-flow ventilation system with a ventilation unit blowing air drawn from outside the building into the living quarters: drawing-rooms, bedrooms of various housing units, and a ventilation unit (5), having the same characteristics as the blowing unit, extracting air from the functional quarters: kitchens, bathrooms blown air from the functional quarters, air supply and air extraction at each housing unit being carried out through ducts common to the entire building. Said installation further comprises at the connection to each housing unit to a pair of ducts (6, 7) respectively for blowing and for extracting air an individual thermodynamic unit (8) specific to the housing unit concerned and whereon passes the stream on ventilating air, the evaporator and the condenser of said unit being arranged respectively on one of the two air blowing and air extracting fluxes.