An apparatus for climate treatment and air renewal for a room located in a building, including: - a first interior air circuit, comprising a first inlet and a first outlet that are connected to the interior of the room; as well as a first fan and a first heat exchanger that are disposed between the first inlet and outlet; - a second new air circuit: a second inlet connected to the exterior of the building; a second outlet connected to the interior of the room; as well as a second fan disposed between the second inlet and outlet; - a third extracted air circuit, comprising: a third inlet connected to the interior of the room; a third outlet connected to the exterior of the building; as well as a third fan disposed between the second inlet and outlet; a second air/air heat exchanger disposed downstream of the second and third inlets so as to allow a heat exchange between the extracted air and the new air; - a fourth circuit (70, 270) for a first fluid, the first heat exchanger being disposed on said fourth circuit so as to allow a heat exchange between said first fluid and the interior air, said apparatus being configured in monobloc form and delimited by a first outer enclosure intended to be disposed inside the room; - an inlet opening and an outlet opening for interior air, intended to open onto the interior of the room, being arranged on the surface of said first outer enclosure, the first and third inlets being connected to the inlet opening and the first and second outlets being connected to the outlet opening by the interior of said first outer enclosure, - an inlet mouth and an outlet mouth for exterior air, intended to be connected to the exterior of the building, being formed on the first outer enclosure, the second inlet being connected to the inlet mouth and the third outlet being connected to the outlet mouth by the interior of said first outer enclosure, the apparatus being characterized in that it comprises: - a first and a second tapping on the second circuit, respectively upstream and downstream of the second heat exchanger; - a third and a fourth tapping on the third circuit, respectively upstream and downstream of the second heat exchanger; - a first, a second, a third and a fourth connection mouth, respectively connected to the first, second, third and fourth tappings, each of said connection mouths being arranged on the surface of the first outer enclosure. - a first interior air circuit, comprising a first inlet and a first outlet that are connected to the interior of the room; as well as a first fan and a first heat exchanger that are disposed between the first inlet and outlet; - a second new air circuit: a second inlet connected to the exterior of the building; a second outlet connected to the interior of the room; as well as a second fan disposed between the second inlet and outlet; - a third extracted air circuit, comprising: a third inlet connected to the interior of the room; a third outlet connected to the exterior of the building; as well as a third fan disposed between the second inlet and outlet; a second air/air heat exchanger disposed downstream of the second and third inlets so as to allow a heat exchange between the extracted air and the new air; - a fourth circuit (70, 270) for a first fluid, the first heat exchanger being disposed on said fourth circuit so as to allow a heat exchange between said first fluid and the interior air, said apparatus being configured in monobloc form and delimited by a first outer enclosure intended to be disposed inside the room; - an inlet opening and an outlet opening for interior air, intended to open onto the interior of the room, being arranged on the surface of said first outer enclosure, the first and third inlets being connected to the inlet opening and the first and second outlets being connected to the outlet opening by the interior of said first outer enclosure, - an inlet mouth and an outlet mouth for exterior air, intended to be connected to the exterior of the building, being formed on the first outer enclosure, the second inlet being connected to the inlet mouth and the third outlet being connected to the outlet mouth by the interior of said first outer enclosure, the apparatus being characterized in that it comprises: - a first and a second tapping on the second circuit, respectively upstream and downstream of the second heat exchanger; - a third and a fourth tapping on the third circuit, respectively upstream and downstream of the second heat exchanger; - a first, a second, a third and a fourth connection mouth, respectively connected to the first, second, third and fourth tappings, each of said connection mouths being arranged on the surface of the first outer enclosure. - a first and a second tapping on the second circuit, respectively upstream and downstream of the second heat exchanger; - a third and a fourth tapping on the third circuit, respectively upstream and downstream of the second heat exchanger; - a first, a second, a third and a fourth connection mouth, respectively connected to the first, second, third and fourth tappings, each of said connection mouths being arranged on the surface of the first outer enclosure.