Viessmann’s Vitocrossal 200 CI2 is a compact floor standing gas condensing boiler designed for large residential and commercial applications. With six sizes ranging from 399 MBH to 2,000 MBH, the boiler offers 97.5-per cent thermal efficiency, up to a 30:1 turndown ratio, and advanced active self-calibrating O2 Trim Technology. The small footprint allows easy access through standard doorways and side-by side installation of up to 16 cascaded boilers. The seven-in. colour touchscreen control panel connects to the Viessmann One Base platform.