An air supply element (1, 1a) for supplying air into a room space, configured to be installed in connection with the ceiling of the room space, characterized in that the air supply element (1, 1a) comprises - a box shaped structure; - a switching device (10, 10a) configured to switch the operation mode of the air supply element (1, 1a) between a first mode and a second mode in response to the switching device (10, 10a) receiving at least one control signal (I1, I2, I3); - an inlet chamber for supplying supply air to the room space, wherein the inlet chamber leads to the switching device (10, 10a) and comprises at least a first inlet for supplying air into the inlet chamber; - an exhaust chamber for receiving room air from the room space, wherein the exhaust chamber leads to the switching device (10, 10a) and comprises at least a first outlet for removing at least part of the room air from the exhaust chamber and from the room space; - a mid plate; wherein inside the box shaped structure there is provided the switching device (10, 10a), and the switching device (10, 10a) and the mid plate separate two chambers (4, 5) in the box shaped structure; the air supply element (1, 1a) comprises further - a first opening and a second opening separated from each other and leading to the switching device (10, 10a) and towards the room space, wherein the switching device (10, 10a) is arranged between the chambers (4, 5) and the openings (6, 7) in such a way that - in the first mode: the switching device (10, 10a) is arranged to connect the inlet chamber to the first opening and the exhaust chamber to the second opening, and - in the second mode: the switching device (10, 10a) is arranged to connect the inlet chamber to the second opening and the exhaust chamber to the first opening. - a box shaped structure; - a switching device (10, 10a) configured to switch the operation mode of the air supply element (1, 1a) between a first mode and a second mode in response to the switching device (10, 10a) receiving at least one control signal (I1, I2, I3); - an inlet chamber for supplying supply air to the room space, wherein the inlet chamber leads to the switching device (10, 10a) and comprises at least a first inlet for supplying air into the inlet chamber; - an exhaust chamber for receiving room air from the room space, wherein the exhaust chamber leads to the switching device (10, 10a) and comprises at least a first outlet for removing at least part of the room air from the exhaust chamber and from the room space; - a mid plate; wherein inside the box shaped structure there is provided the switching device (10, 10a), and the switching device (10, 10a) and the mid plate separate two chambers (4, 5) in the box shaped structure; the air supply element (1, 1a) comprises further wherein inside the box shaped structure there is provided the switching device (10, 10a), and the switching device (10, 10a) and the mid plate separate two chambers (4, 5) in the box shaped structure; the air supply element (1, 1a) comprises further - a first opening and a second opening separated from each other and leading to the switching device (10, 10a) and towards the room space, wherein the switching device (10, 10a) is arranged between the chambers (4, 5) and the openings (6, 7) in such a way that - in the first mode: the switching device (10, 10a) is arranged to connect the inlet chamber to the first opening and the exhaust chamber to the second opening, and - in the second mode: the switching device (10, 10a) is arranged to connect the inlet chamber to the second opening and the exhaust chamber to the first opening.