GWB8-E: A Gas-Fire Water Boiler You Can Depend On The Lennox® GWB8-E offers heat just when you need it most. This boiler uses 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 turns the burner on only when it’s needed. Energy savings are maximized with a thick fiberglass insulation and vent damper, which closes on its own 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. 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. Prefer not to use natural gas? That’s okay. 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: high-quality parts, energy efficiency and dependability. Call your Roy Inch & Sons Service Experts Heating & Air Conditioning in at 226-270-1164 to learn more or schedule a free appointment. We’re located in London, so a comfy home is closer than you might think. 1 262 and 299 models feature titanium burners. 2 Shipped as natural gas; convertible to LP.