The Warmflow Agentis Internal Pumped 15-21kW Oil Boiler comes complete with a factory-fitted Grundfos UPM3 flex pump, an auto air vent, and a 3 bar safety valve as standard. The stylish white casing houses a highly efficient, patented heat exchanger and the latest Riello low NOx technology. This ERP A rated boiler is designed for internal installation in kitchens or utility rooms, providing a pre-plumbed solution that simplifies the installation process for heating engineers.