An exhaust air treatment system, particularly for large kitchens, with at least one support member and with at least one removable housing member mounted or mountable on the support member, through which housing member exhaust air flows or is flowable in operation of the exhaust air treatment system and arranged in which housing portion there is at least one UV unit, by which the exhaust air may be acted on by electromagnetic radiation in the UV region, wherein provided on the support member and on the housing member together there is at least one electrical contact device, characterised in that the electrical contact device includes: a first contact carrier with a first number of first contact elements; a second contact carrier with a second number of second contact elements; and a spring force device, which is constructed to act on the second contact carrier; wherein at least a smaller number of the first contact elements or of the second contact elements are so arranged that they are moved or are movable together into electrically conductive contact with a respective contact element on the other contact carrier in pairs in order to form electrical contact pairs in a connected state of the contact device; wherein the first contact elements or the second contact elements are constructed as spring contacts, the tips of which project, at least in an unconnected state of the contact device, beyond a surface of the contact carrier in question by an excess dimension, which surface is directed towards the other contact carrier, at least in the connected state; wherein a spring force is produced or producible by the spring force device on the second contact carrier in the direction towards the first contact carrier, when the said pairs of contact elements are formed; wherein the first contact carrier is fastened substantially immovably to a first support device, which first support device is arranged on the support member or is constituted by this support member; wherein the second contact carrier is fastened to a second support device and is movable with respect to this second support device against the spring force produced or producible by the spring force device, which second support device is arranged on the housing member or is constituted by this housing member; and wherein the connected state of the contact device is reached when arranging the housing member on the support member. a first contact carrier with a first number of first contact elements; a second contact carrier with a second number of second contact elements; and a spring force device, which is constructed to act on the second contact carrier; wherein at least a smaller number of the first contact elements or of the second contact elements are so arranged that they are moved or are movable together into electrically conductive contact with a respective contact element on the other contact carrier in pairs in order to form electrical contact pairs in a connected state of the contact device; wherein the first contact elements or the second contact elements are constructed as spring contacts, the tips of which project, at least in an unconnected state of the contact device, beyond a surface of the contact carrier in question by an excess dimension, which surface is directed towards the other contact carrier, at least in the connected state; wherein a spring force is produced or producible by the spring force device on the second contact carrier in the direction towards the first contact carrier, when the said pairs of contact elements are formed; wherein the first contact carrier is fastened substantially immovably to a first support device, which first support device is arranged on the support member or is constituted by this support member; wherein the second contact carrier is fastened to a second support device and is movable with respect to this second support device against the spring force produced or producible by the spring force device, which second support device is arranged on the housing member or is constituted by this housing member; and wherein the connected state of the contact device is reached when arranging the housing member on the support member.