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 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 reach nearly 84% AFUE, leading to a decrease in your utility bills. The GWB8-E makes our installation job even easier. It’s simple to connect with your radiator system and it’s available in multiple sizes. That means you can install this boiler almost anywhere in your home. Concerned about using natural gas? That’s fine. The GWB8-E can alternatively be fueled by LP gas instead.2 Containing three qualities we want to see in a boiler, the GWB8-E has it all: well-made parts, energy efficiency and dependability. Call your Peitz Service Experts Heating & Air Conditioning in at 605-223-0307 to find out more or schedule a free appointment. We’re located in Pierre, 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.