GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E provides warmth just when you need it most. This boiler uses a cast iron heat exchanger and stainless steel burners created to resist corrosion and oxidation1 and last for years. Reliable heat year after year? It can’t get much better than that. Similar to our other boilers, this boiler has an electronic ignition control that only turns on the burner 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, the GWB8-E’s efficiency ratings can achieve nearly 84% AFUE, leading to a decrease in your 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 multiple sizes. That means you can install this boiler virtually anywhere in your house. Prefer not to use natural gas? That’s okay. The GWB8-E can also be fueled by LP gas instead.2 Containing three qualities we want to see in a boiler, the GWB8-E has it all: reliable parts, energy efficiency and dependability. Call your Climate Control Service Experts Heating & Air Conditioning in at 251-202-7503 to learn more or schedule a free appointment. We’re located in Mobile, 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.