stop r frost protection valve with outdoor air sensor series 108 Connection size:1 1/4" - 70 kV The generously sized loading chamber

The generously sized loading chamber simplifies firewood preparation and supports longer burn cycles

Pellet boiler

The same applies here

Emergency operation with logs is possible according to the manual

stop r frost protection valve with outdoor air sensor series 108 Connection size:1 1/4" - 70 kV The generously sized loading chamberCaleffi frost protection valve for heat pumps 1" and 1 1 4'' with outside air duct The frost protection valve prevents the medium in the system circuit from freezing and thus prevents damage to the heat pump and pipes. The valve is a mechanically operating protective system. The version with an outdoor air sensor allows the system to operate in cooling mode even when the water temperature approaches 3C. TECHNICAL DATA Frost protection valve Caleffi