GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E offers warmth at the times you need it most. This boiler uses a cast iron heat exchanger and stainless steel burners created to prevent corrosion and oxidation1 and last for years. Reliable heat year after year? It really is that good. Similar to our GSB8-E product, this boiler has an electronic ignition control that only turns on the burner when it’s needed. Energy savings are maximized with a 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 more dollars subtracted from your monthly 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 multiple sizes. That means you can install this boiler almost anywhere in your home. Don’t want your boiler to use natural gas? No problem. 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 Broad Ripple Service Experts Heating & Air Conditioning in at 317-527-0271 to find out more or schedule a free appointment. We’re located in Indianapolis, 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.