Energy-saving controller, heating controller, energy, energy saving. Save up to 30% on heating costs. Frost protection function, vacation function, open window detection. Daily program, weekly program. Easy operation via rotary knob. Thread connection M30 x 1.5. Four heating and saving times adjustable. The HT 430-22 is an extremely compact energy-saving heating controller that can save up to 30% on heating costs. It is powered by batteries that last up to 5 years. Its operation is very quiet. The control is done via a rotary knob. With the thread connection M30 x 1.5, it fits many well-known valve bodies, such as those from Heimeier, Danfoss, Honeywell Braukmann, Honeywell, MNG, and Oventrop. In daily and weekly programs, four heating and saving times as well as the corresponding temperatures can be set. The switch between summer and winter time occurs automatically. A frost protection and vacation function is also available. Open windows are detected to reduce heating output during ventilation. A factory default program facilitates quick commissioning.