The ON/OFF zone valves type AMZ 112 is typical used in connection with: Commercial central heating applications; Solar energy plants; HVAC ; Priority control of hot water supply and heating (diverting function); Priority control of boiler and solid fuel installations (diverting function). The ON/OFF zone valves can be applied together with most Danfoss Room Thermostats, particularly type RET 230 (single poled switch) and programmable Room Thermostats type RET 1000/2000.