GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E provides warmth just when you need it most. This boiler uses a cast iron heat exchanger and stainless steel burners built to avoid corrosion and oxidation1 and last for years. Effective heat year after year? It can’t get much better than that. Similar to our other boilers, this boiler has an electronic ignition control that turns the burner on only when it’s needed. Energy savings are maximized 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 add up to nearly 84% AFUE, leading to reduced energy bills. Installion is a breeze when it’s the GWB8-E. It’s easy to integrate with your radiator system and it’s available in nine sizes. That means you can install this boiler nearly anywhere you want. Don’t want your boiler to use natural gas? No problem. The GWB8-E can also be fueled by LP gas instead.2 Containing three qualities we want to see in a boiler, the GWB8-E has it all: high-quality parts, energy efficiency and dependability. Call your Service Experts Heating & Air Conditioning in at 318-588-8163 to learn more or schedule a free appointment. We’re located in Shreveport, 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.