Viessmann B1KA 125,000 BTU Vitodens 100-W Gas-Fired Wall-Mounted Condensing Combi Boiler

Gas-fired wall-mounted condensing boiler with modulating stainless steel cylinder burner and Inox-Radial heat exchanger surface. Features: All the benefits of a Vitodens 100-W boiler, plus built-in on-demand domestic hot water (DHW) – no need for an additional storage tank DHW at the snap of your fingers all day long! Up to 3.5 GPM† Optimized load matching with up to 6:1 turndown ratio Energy-saving and low-cost, on-demand indirect-fired DHW production Conforms to NSF/ANSI 372 for Low Lead Content Quality you can count on! Stainless steel heat exchanger, built-in pressure bypass and 150 psig working pressure rating (on DHW side only) Reliable and consistent DHW supply with built-in DHW temperature and flow sensors Complete space / DHW heating management by boiler control, powerful built-in 3-speed pump and diverting valve