GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E offers heat at the times you need it most. This boiler includes a cast iron heat exchanger and stainless steel burners built to prevent corrosion and oxidation1 and last for years. Reliable heat year after year? It really is that good. Similar to our some of our other products, this boiler has an electronic ignition control that only turns on the burner when it’s needed. Additional energy savings are possible with the GWB8-E’s thick fiberglass insulation and vent damper, which closes on its own when the boiler turns off. In fact, its efficiency ratings can add up to nearly 84% AFUE, leading to a decrease in your utility bills. Installion is a breeze when it’s the GWB8-E. We can easily integrate it with your radiator system and it’s available in a variety of sizes. That means you can install this boiler almost anywhere you want. Concerned about using natural gas? That’s fine. The GWB8-E can alternatively be fueled by LP gas instead.2 Containing three qualities we want to see in a boiler, the GWB8-E has it all: well-made parts, energy efficiency and dependability. Call your Rolf Griffin Service Experts Heating & Air Conditioning in at 260-557-1275 to discover more or schedule a free appointment. We’re located in Fort Wayne, 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.