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 designed to resist corrosion and oxidation1 and last for years. Reliable heat year after year? It’s just as sweet as it sounds. 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 closes by itself when the boiler turns off. In fact, its efficiency ratings can add up to nearly 84% AFUE, leading to a decrease in your 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 nine sizes. That means you can install this boiler nearly anywhere you want. Prefer not to use natural gas? That’s okay. The GWB8-E can 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 Limcan Walker/Certified Service Experts Heating & Air Conditioning in at (289) 274-4367 to learn more or schedule a free appointment. We’re located in Whitby, 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.