GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E offers heat at the times you need it most. This boiler includes a cast iron heat exchanger and stainless steel burners designed 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 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 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. We can easily integrate it with your radiator system and it’s available in a variety of sizes. That means you can install this boiler nearly anywhere you want. Prefer not to use natural gas? That’s fine. The GWB8-E can also 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: high-quality parts, energy efficiency and dependability. Call your Service Experts Heating & Air Conditioning in at 866-397-3787 to learn more or schedule a free appointment. We’re located in Canada, 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.