The COWB3 Boiler: Efficient Performance for Years You never know just how harsh the winter will be, so why risk your home’s warmth? Be ready for the worst – and cozy throughout the season – with a Lennox® COWB3 boiler. This standard-efficiency heating system features 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 brings us over the edge. That’s on reason why we love the COWB3 system’s sealed-combustion design. Not only is your heating quiet, it’s also draft-free. What makes this product even better is its effortless integration with conventional radiator systems. When you buy a COWB3 boiler through your San Antonio Air Service Experts Heating & Air Conditioning in San Antonio, you’ll get reliability, durability and expert furnace installation service. Ready to see what a new boiler can do for you? The COWB3 boiler is available in three models so you can select the best one for your home. Schedule your free appointment with San Antonio Air Service Experts in San Antonio online or call 210-570-9705 to get started.