Air renewal and treatment device comprising: - first and second heat exchangers, and - a plurality of air ducts (121, 122, 123 and 131), being characterized in that said device has a three-dimensional structure comprising at least: - an upper zone divided vertically into at least first and second compartments; - a lower zone divided vertically into at least third and fourth compartments; - said first compartment comprising the first heat exchanger and a treated air outlet (SAT); - said third compartment comprising at least one air duct to which a recycled air inlet (EAR) is connected and in fluid communication with said first compartment ; - said fourth compartment comprising the second heat exchanger and in fluid communication with the third compartment ; - said second compartment comprising a first air duct to which a fresh air inlet (EAN) is connected and a second air duct to which a foul air inlet (EAV) is connected and in fluid communication with said fourth compartment ; - the first heat exchanger being a tube heat exchanger heating and/or cooling a mixture of air originating from the third compartment and said mixture then being injected via the treated air outlet (SAT); - the second heat exchanger being a double-flow heat exchanger recovering energy from a foul air (AV) entering via said foul air inlet (EAV) and conveyed via the second duct to heat and/or cool a fresh air (AN) entering via the fresh air inlet (EAN) and conveyed via the first duct ; - the mixture of air originating from the third compartment corresponding to a mixture of the fresh air (AN) originating from the second heat exchanger and from a recycled air (AR) originating from the recycled air inlet (EAR). - first and second heat exchangers, and - a plurality of air ducts (121, 122, 123 and 131), - an upper zone divided vertically into at least first and second compartments; - a lower zone divided vertically into at least third and fourth compartments; - said first compartment comprising the first heat exchanger and a treated air outlet (SAT); - said third compartment comprising at least one air duct to which a recycled air inlet (EAR) is connected and in fluid communication with said first compartment ; - said fourth compartment comprising the second heat exchanger and in fluid communication with the third compartment ; - said second compartment comprising a first air duct to which a fresh air inlet (EAN) is connected and a second air duct to which a foul air inlet (EAV) is connected and in fluid communication with said fourth compartment ; - the first heat exchanger being a tube heat exchanger heating and/or cooling a mixture of air originating from the third compartment and said mixture then being injected via the treated air outlet (SAT); - the second heat exchanger being a double-flow heat exchanger recovering energy from a foul air (AV) entering via said foul air inlet (EAV) and conveyed via the second duct to heat and/or cool a fresh air (AN) entering via the fresh air inlet (EAN) and conveyed via the first duct ; - the mixture of air originating from the third compartment corresponding to a mixture of the fresh air (AN) originating from the second heat exchanger and from a recycled air (AR) originating from the recycled air inlet (EAR). <EOS>