GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E offers warmth just when you need it most. This boiler includes a cast iron heat exchanger and stainless steel burners built to resist corrosion and oxidation1 and last for years. Reliable heat year after year? It can’t get much better than that. Similar to our some of our other products, this boiler has an electronic ignition control that starts the burner only when it’s needed. Additional energy savings are possible with the GWB8-E’s thick fiberglass insulation and vent damper, which closes by itself when the boiler turns off. In fact, the GWB8-E’s 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. It’s simple to connect with your radiator system and it’s available in nine sizes. That means you can install this boiler almost anywhere in your home. Don’t want your boiler to use natural gas? That’s okay. The GWB8-E can alternatively 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: reliable parts, energy efficiency and dependability. Call your Epperson Service Experts Heating & Air Conditioning in at 843-619-3781 to learn more or schedule a free appointment. We’re located in Hilton Head Island, so a comfy home is closer than you might think. 1 262 and 299 models feature titanium burners. 2 Shipped as natural gas; convertible to LP.