GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E offers warmth just when you need it most. This boiler includes a cast iron heat exchanger and stainless steel burners created to avoid 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 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, the GWB8-E’s efficiency ratings can reach nearly 84% AFUE, leading to reduced energy bills. The GWB8-E makes our installation job even easier. It’s simple to connect with your radiator system and it’s available in a variety of sizes. That means you can install this boiler almost anywhere you want. Prefer not to use natural gas? That’s okay. The GWB8-E can 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 Becht / Givens Service Experts Heating & Air Conditioning in at 502-785-8230 to discover more or schedule a free appointment. We’re located in Louisville, 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.