A method for providing thermal separation between a conditioned environment (11, 111) at a temperature T1 and at least one environment (12, 112) that is external thereto at a temperature T2, said environments being adjacent, the method comprising: providing a wall (13, 113, 213) including a first active layer region (14, 114) accommodating a first channel (18a, 118a) for outflow of a first heat transfer fluid, a second active layer region (15, 115) arranged toward said external environment with respect to said first active layer region (14, 114), said second active layer region (15, 115) accommodating a second channel (18b, 118b) for outflow of a second heat transfer fluid, a first insulating layer region (16, 116), which is interposed between said first and second active layer regions, and a second insulating layer region (17, 117), which is interposed between said second active layer region (15, 115) and said external environment (12, 112), wherein said first and second active layer regions (14, 114; 15, 115) result in a thermal stratification of said wall, having a thermal gradient defined by: introducing the second heat transfer fluid into the second channel (18b, 118b) having an average inflow temperature T5 and a temperature T6 at which the second heat transfer fluid exits from the second channel (18b, 118b) and introducing said first heat transfer fluid into the first channel (18a, 118a) having an average inflow temperature T3 and a temperature T4 at which said first heat transfer fluid exits from the first channel (18a, 118a), wherein the first heat transfer fluid and the second heat transfer fluid circulate in the same circuit of which said first and second channels (18a, 118a; 18b, 118b) constitute two different consecutive branches, the heat transfer fluids pass firstly through the first active layer region (14, 114) and then through the second active layer region (15, 115), wherein in summer conditions T 1 < T 2, T 6 > T 5 > T 4 > T 3, T 3 > T 1 or T 3 < T 1, and T 6 > T 2 or T 6 < T 2, characterised in that in winter conditions T 1 > T 2, T 3 > T 4 > T 5 > T 6, T 5 < T 1, and T 6 > T 2. providing a wall (13, 113, 213) including a first active layer region (14, 114) accommodating a first channel (18a, 118a) for outflow of a first heat transfer fluid, a second active layer region (15, 115) arranged toward said external environment with respect to said first active layer region (14, 114), said second active layer region (15, 115) accommodating a second channel (18b, 118b) for outflow of a second heat transfer fluid, a first insulating layer region (16, 116), which is interposed between said first and second active layer regions, and a second insulating layer region (17, 117), which is interposed between said second active layer region (15, 115) and said external environment (12, 112), wherein said first and second active layer regions (14, 114; 15, 115) result in a thermal stratification of said wall, having a thermal gradient defined by: introducing the second heat transfer fluid into the second channel (18b, 118b) having an average inflow temperature T5 and a temperature T6 at which the second heat transfer fluid exits from the second channel (18b, 118b) and introducing said first heat transfer fluid into the first channel (18a, 118a) having an average inflow temperature T3 and a temperature T4 at which said first heat transfer fluid exits from the first channel (18a, 118a), wherein the first heat transfer fluid and the second heat transfer fluid circulate in the same circuit of which said first and second channels (18a, 118a; 18b, 118b) constitute two different consecutive branches, the heat transfer fluids pass firstly through the first active layer region (14, 114) and then through the second active layer region (15, 115), wherein in summer conditions T 1 < T 2, T 6 > T 5 > T 4 > T 3, T 3 > T 1 or T 3 < T 1, and T 6 > T 2 or T 6 < T 2, characterised in that in winter conditions T 1 > T 2, T 3 > T 4 > T 5 > T 6, T 5 < T 1, and T 6 > T 2. introducing the second heat transfer fluid into the second channel (18b, 118b) having an average inflow temperature T5 and a temperature T6 at which the second heat transfer fluid exits from the second channel (18b, 118b) and introducing said first heat transfer fluid into the first channel (18a, 118a) having an average inflow temperature T3 and a temperature T4 at which said first heat transfer fluid exits from the first channel (18a, 118a), wherein the first heat transfer fluid and the second heat transfer fluid circulate in the same circuit of which said first and second channels (18a, 118a; 18b, 118b) constitute two different consecutive branches, the heat transfer fluids pass firstly through the first active layer region (14, 114) and then through the second active layer region (15, 115), wherein in summer conditions T 1 < T 2, T 6 > T 5 > T 4 > T 3, T 3 > T 1 or T 3 < T 1, and T 6 > T 2 or T 6 < T 2, characterised in that in winter conditions T 1 > T 2, T 3 > T 4 > T 5 > T 6, T 5 < T 1, and T 6 > T 2.