GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E offers heat just when you need it most. This boiler features a cast iron heat exchanger and stainless steel burners designed to resist corrosion and oxidation1 and last for years. Consistent heat year after year? It really is that good. Similar to our other boilers, this boiler has an electronic ignition control that starts the burner only when it’s needed. Energy savings are maximized with a thick fiberglass insulation and vent damper, which automatically closes when the boiler turns off. In fact, this boiler’s efficiency ratings can achieve nearly 84% AFUE, leading to reduced energy 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 a variety of sizes. That means you can install this boiler virtually anywhere in your home. Prefer not to use natural gas? No problem. The GWB8-E can alternatively be fueled by LP gas instead.2 Featuring most all the qualities we want to see in a boiler, the GWB8-E has it all: well-made parts, energy efficiency and dependability. Call your TML Service Experts Heating & Air Conditioning in at 208-488-4892 to discover more or schedule a free appointment. We’re located in Boise, 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.