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 includes 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 turns the burner on only when it’s needed. Energy savings are maximized 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. We’re already experts at boiler installations, but the GWB8-E makes our job more simple. It’s simple to connect with your radiator system and it’s available in multiple sizes. That means you can install this boiler nearly anywhere you want. Prefer not to use natural gas? No problem. 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: high-quality parts, energy efficiency and dependability. Call your Service Experts Heating & Air Conditioning in at 561-629-1826 to discover more or schedule a free appointment. We’re located in West Palm Beach, 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.