GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E provides warmth at the times you need it most. This boiler features a cast iron heat exchanger and stainless steel burners designed to prevent corrosion and oxidation1 and last for years. Reliable heat year after year? It’s just as sweet as it sounds. Similar to our some of our other products, this boiler has an electronic ignition control that turns the burner on only when it’s needed. It further maximizes energy savings with a thick fiberglass insulation and vent damper, which closes on its own when the boiler turns off. In fact, the GWB8-E’s efficiency ratings can reach nearly 84% AFUE, leading to reduced energy bills. The GWB8-E makes our installation job even easier. It’s easy to integrate with your radiator system and it’s available in nine sizes. That means you can install this boiler virtually anywhere you want. Concerned about using natural gas? No problem. The GWB8-E can also be fueled by LP gas instead.2 Having many of the qualities we want to see in a boiler, the GWB8-E has it all: well-made parts, energy efficiency and dependability. Call your McKinley Heating Service Experts Heating & Air Conditioning in at 780-800-7092 to discover more or schedule a free appointment. We’re located in Edmonton, so a relaxing home is closer than you might think. 1 262 and 299 models feature titanium burners. 2 Shipped as natural gas; convertible to LP.