Our first all-in -one boiler is available to order now! A small and compact unit combines a vertical flame pellet burner with a unique construction, a boiler with built-in ash cyclone, a pellet auger, a silo and an expansion tank. With its smart house controller it can manage your house heating system and also a second heat source (if installed) to keep your house on preset temperature. Read more about the PK Combi boiler here.