The ProLine® XE Combi Boiler comes with an industry-leading 4.8 gal/min capacity which means it can deliver reliable hot water for hydronic heat for the entire house in addition to supplying enough domestic hot water for a standard single family home or apartment. The ACB-199H-N indoor residential Ultra-Low NOx Combi Boiler uses up to 199,000 BTU/hr of Natural Gas to deliver a continuous supply of hot water and space heating for homes in high altitude regions. This model is rated at 95% AFUE (Annual Fuel Utilization Efficiency) and is ENERGY STAR® certified, making it eligible for many local utility rebate programs. Its power direct vent design can be vented up to 100 feet using either PVC, CPVC, polypropylene or AL29-4C stainless steel vent pipe, allowing for flexible and easy installation. The user-friendly LCD display provides system status and diagnostic information for easy set up and maintenance. All of these features come with a 10-year limited heat exchanger warranty and 5-year limited parts warranty.

A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.