GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E offers heat effectively when you need it most. This boiler uses a cast iron heat exchanger and stainless steel burners built to prevent corrosion and oxidation1 and last for years. Reliable heat year after year? It really is that good. Similar to our some of our other products, this boiler has an electronic ignition control that only turns on the burner when it’s needed. Energy savings are maximized with a thick fiberglass insulation and vent damper, which automatically closes when the boiler turns off. In fact, this boiler’s efficiency ratings can achieve 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. 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. Concerned about using natural gas? That’s fine. The GWB8-E can alternatively 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: reliable parts, energy efficiency and dependability. Call your Service Experts Heating & Air Conditioning in at 303-647-5749 to discover more or schedule a free appointment. We’re located in Longmont, 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.