Relax with Reliable Comfort Season After Season. Rapids Sheet Metal Works Inc in Wisconsin Rapids knows the winters seem to go on forever, but we can help you stay snug and warm. Our dependable Lennox® oil-fired water boiler is just what you need. This trusty boiler will keep your home cozy and can be equipped with an attached tankless coil to provide hot water for your showers, laundry and other household uses for very little additional energy cost. The COWB3 boiler is an efficient option for your home comfort. COWB3 BoilerThe Beckett® oil burner sets the example for reliable, fuel-efficient heating. That’s absolutely why it’s used in the COWB3 boiler. You and your family can plan on years of almost silent performance from this boiler. 85.2% AFUE* Optional, domestic tankless hot water coil provides hot water for very little cost throughout the wintertime Sealed combustion design keeps noise very low Swing-out burner door for easy cleaning and maintenance Works with traditional radiator systems Cast-iron heat exchanger for lasting reliability 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 are always ready to serve the Wisconsin Rapids area. If you’re looking for a new boiler or need maintenance on your home’s boiler, call us at 715-421-5555 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.