Relax with Reliable Comfort Season After Season. With a reliable Lennox® oil-fired water boiler from Campbell's Tempracure in Crystal Lake, you’ll stay warm and snug—even on winter’s harshest days. And, by adding an optional tankless coil, your high-efficiency boiler can also make hot water for all your household needs, for very little money during the winter months. See what the COWB3 boiler has to offer. COWB3 BoilerYou can expect years of ultraquiet performance from the COWB3 boiler. It is made with the Beckett® oil burner, which is the standard for predictable fuel-efficient heating. 85.2% AFUE* Optional, domestic tankless hot water coil heats hot water for a very small cost throughout the wintertime Sealed combustion design keeps noise very low Swing-out burner door for simple cleaning and maintenance Works with traditional radiator systems Cast-iron heat exchanger for lasting performance 20-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts Efficiency Rating (AFUE): up to 85.2 Product Brochure Contact Us to Learn More Our boiler professionals at Campbell's Tempracure are always ready to assist with all your boiler needs, whether you want a new boiler or boiler maintenance. Call our Crystal Lake location at 815-788-6283 today, or set up your appointment online. *Annual Fuel Utilization Efficiency (AFUE) measures how efficient the appliance is in converting its fuel’s energy into heat over the course of a year.