The COWB3 Boiler: Efficient Performance for Years You can’t predict winter weather, so why risk your family’s comfort? Be ready for the worst – and cozy all winter – with a Lennox® COWB3 boiler. This standard-efficiency heating system uses a Beckett® oil burner, the product that set a benchmark for fuel-efficient heating. Thanks to a domestic hot water coil that provides hot water at almost no extra cost, you’ll see greater energy efficiency. Winter temperatures are one thing, but it’s the wind that really chills our bones. That’s on reason why we love the COWB3 system’s sealed-combustion design. You’ll even get quiet and draft-free heating. What makes the COWB3 even better is its effortless integration with conventional radiator systems. When you buy a COWB3 boiler through your D & K Heating Service Experts Heating & Air Conditioning in Belleville, you’ll get reliability, durability and expert furnace installation service. Ready to see what a new heating system can do for you? This boiler is available in three models so you can select the best equipment for your home. Schedule your free appointment with D & K Heating Service Experts in Belleville online or call 613-707-2421 to get started.