See how easy it is to upgrade your steam radiator valve to receive a Danfoss Thermostatic Radiator Valve (TRV). The TRV kit includes everything you need to replace the serviceable internal parts of the valve so that you can enjoy the cost saving benefits of a thermostatically controlled valve. You can also choose either a wall-mounted or radiator-mounted thermostat operator. No special tools are needed — which makes the TRV radiator control a quick and easy way to provide more comfort for less energy.