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 avoid corrosion and oxidation1 and last for years. Effective heat year after year? It really is that good. Similar to our other boilers, this boiler has an electronic ignition control that only turns on the burner when it’s needed. It further maximizes energy savings with a thick fiberglass insulation and vent damper, which automatically closes when the boiler turns off. In fact, its efficiency ratings can add up to nearly 84% AFUE, leading to more dollars subtracted from your monthly utility bills. The GWB8-E makes our installation job even easier. It’s easy to integrate with your radiator system and it’s available in a variety of sizes. That means you can install this boiler almost anywhere in your house. Don’t want your boiler to use natural gas? That’s okay. 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 Service Experts Heating & Air Conditioning in at 801-871-8425 to discover more or schedule a free appointment. We’re located in Salt Lake City, so a cozy home is closer than you might think. 1 262 and 299 models feature titanium burners. 2 Shipped as natural gas; convertible to LP.