Because the valve body design is not sensitive to water flow direction and its radiator tail and copper tube connections are interchangeable, the VT200 radiator thermostat can be mounted vertically or horizontally at either end of the radiator without water hammer occurring. The VT200 Classic should not be fitted to a radiator in a room where there is a room thermostat. Suitable for two pipe systems only. The Classic has the additional advantage of appeal to home owners with its modern styling blending with any decor.