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 includes a cast iron heat exchanger and stainless steel burners designed to avoid corrosion and oxidation1 and last for years. Consistent heat year after year? It’s just as sweet as it sounds. Similar to our GSB8-E product, this boiler has an electronic ignition control that turns the burner on 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, this boiler’s efficiency ratings can add up to nearly 84% AFUE, leading to more dollars subtracted from your monthly utility bills. We’re already experts at boiler installations, but the GWB8-E makes our job more simple. 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 almost anywhere in your home. Prefer not to use natural gas? That’s fine. The GWB8-E can also 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: well-made parts, energy efficiency and dependability. Call your Peachtree Service Experts Heating & Air Conditioning in at 678-235-9699 to learn more or schedule a free appointment. We’re located in Atlanta, 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.