The TRV Radiator Valves by Drayton are designed for hydronic heating systems, providing a variable heat setting with a timerless control system. Made of brass, these valves can be mounted on the wall in a horizontal or vertical orientation. The unit includes a thermostat for adjustable temperature control and is compatible with most heating systems. With a BTU heating rating of 2000-2999 BTU, these valves offer efficient heating for any home heating needs.