B2HE-120 Vitodens 200-W (8-113 BTU Output) 95%EFF 3/4" GAS; 3/4" HTG SPLY/RTN 80/125 MM COAX OR 3'' PPS

Best value in its class with new industry-leading technology and the most standard features | Highest Efficiency up to 98% at full modulation and up to 95% A.F.U.E. | Lasting performance with industry-leading Viessmann made SA240 / S43932 stainless steel Inox-Radial heat exchanger constructed to CSA B51 and ASME Section IV | Low Emission Combustion with Viessmann made stainless steel MatrixPlus cylinder burner - Factory calibrated | Fast Installation and Reduced Maintenance with Lambda Pro, industry-first intelligent combustion management system: Adjusts automatically to gas type and quality - No fuel conversion kit required | Powerful and User-friendly Viessmann 7 in. color touchscreen control with on-board multi-function outdoor reset boiler and system control for multi-temperature space and DHW heating | Zone circuit capabilities provide 4 input connections that allow easy integration of third party components such as thermostats, SIM controls, Multi-zone controllers, and other smart or on/off control technologies | Commission assistant that prompts the installer for the relevant information necessary to setup the system without having to go into complex settings parameters | The unique capability allows the installer to combining temperature setpoint operation and outdoor reset capability. This means that one or all of the 4 zone circuits control can operate on a set temperature, or vary based on the outdoor reset curve that is selected in the start-up wizard | Control of up to 3 mixing valve circuits using mixing valve extension module (optional accessory) | Greater Venting Flexibility with increased vent length up to 180 ft. (55 m) and multiple venting options: Horizontal or vertical sealed combustion coaxial venting (field supplied), Horizontal, vertical or hybrid sealed combustion double-pipe venting (field supplied), Horizontal or vertical single-wall venting (field supplied) | Compact, Esthetic Product Design and zero clearance to combustibles | Extremely Quiet Operation | quieter than most refrigerators | True High-Altitude Operation up to 10,000 ft. (3,000 m) with simple electronic adjustment | Efficiency up to 98% through intensive condensation | The flue gas temperature is only approximately 9-27F (5-15C) above boiler return temperature | Integrated variable speed boiler pump