Thermostatic radiator valve
A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator.
A thermostatic radiator valve on position 2 (15–17 °C)
Installed thermostatic radiator valve with the adjustment wheel removed
Cutaway model of a thermostatic radiator valve
Radiators and convectors are heat exchangers designed to transfer thermal energy from one medium to another for the purpose of space heating.
A cast iron household radiator
Heat exchange by built-in bathroom radiator uses hot water flow through the stainless steel pipes seen here to raise the temperature of the ambient air. The radiator depicted here also serves as a towel rack and warmer.
Hot-water baseboard-style radiator (top) which is covered (left) and opened (right), with inside view (bottom) showing the aluminium fins which are attached in series to the copper pipe
A cast iron radiator with single-pipe steam supply and radiator air vent