Viessmann’s Vitocrossal 200, CM2 gas-fired condensing boiler offers thermal efficiency up to 97%. Its fully modulating premix cylinder burner operates with low inlet gas pressure (NG) of only 4”, while the large water content extends burner run time and reduces cycling. Extremely low water pressure drop-through the Inox-Crossal stainless-steel heat exchanger eliminates the need for a dedicated boiler pump and low-loss header in single-boiler installations. With fuel flexibility, multiple venting options and inputs from 663 to 1,112 MBH (single)/663 to 4,448 MBH (four-boiler cascade), the Vitocrossal 200, CM2 is ideal for large residential and commercial applications.