The Viessmann Vitocrossal 300, CU3A is a gas condensing, floor mounted boiler with an efficiency of 95% AFUE. The Vitocrossal 300, CU3A was named an Energy Star Most Efficient 2016 product. It is designed to be an easy replacement for older cast iron sectional boilers, with simple connections allowing existing piping to remain intact. Exhaust and intake air flue connections are located 11.5 inches off the ground for easy connection to existing chimneys. The unit features an Inox-Crossal stainless steel heat exchanger which is self-cleaning for reduced maintenance, and multiple venting options and configurations, with vent lengths of almost 200 feet. The Vitocrossal 300, CU3A is shipped for use with natural gas but is easily convertible to liquid propane.
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