Relax with Reliable Comfort Season After Season. Banister's Heating & Air Conditioning Services in Carlsbad knows the colder months seem to go on forever, but we can help you stay comfy and warm. Our dependable Lennox® oil-fired water boiler can help. This boiler will keep you and your family comfortable and can be equipped with an attached tankless coil to heat water for your showers, laundry and other household uses for very little additional energy cost. For an efficient home comfort option, look at the COWB3 boiler. COWB3 BoilerThe Beckett® oil burner sets the example for reliable, fuel-efficient heating. That’s exactly why it’s used in the COWB3 boiler. 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 a very small cost throughout the cold season Sealed combustion design keeps noise at an unnoticeable level 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 experts are here to serve the Carlsbad area. If you’re looking for a new boiler or need maintenance on your existing boiler, call us at 575-446-3948 today, or make 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.