The Benefits at a Glance - Available in three models from 12 to 125 MBH (single-boiler installation). - Efficiency up to 98% at full modulation and 95% AFUE. - Lasting performance with industry-leading Viessmann made SA240 316 Ti stainless steel Inox-Radial heat exchanger constructed to CSA B51 and ASME Section IV. - Low-emission combustion with Viessmann made stainless steel MatriX cylinder burner for natural gas or propane.
Factory calibrated - Wide modulation range up to 6.5:1 to precisely match load conditions. - 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. - On-board Vitotronic control features large display with text and graphics for straightforward, menu-driven programming and operation. - Outdoor reset boiler and system control for multi-temperature space and DHW heating.
Greater venting flexibility with increased vent length (up to 180') and multiple venting options. - Horizontal or vertical sealed combustion coaxial venting (factory supplied). - Horizontal, vertical or hybrid sealed combustion double-pipe venting (field supplied). - Horizontal or vertical single-wall venting (field supplied). - Compact, lightweight 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. - Limited lifetime warranty in residential applications.
