GWB9-IH Boilers: High-Efficiency with Faster Heat Transfer If you’re looking for a high-efficiency boiler, look no further than the Lennox® GWB9-IH. This boiler has earned ENERGY STAR® certification, meaning it meets or exceeds federal guidelines for energy efficiency. But that’s not all. The GWB9-IH boiler also produces an AFUE rating of 90%, which translates to 90% of the fuel being converted to usable heat. Yes, being energy efficient helps the environment, but what’s in it for you? For starters, you could start seeing a decrease in your utility bills. Further, you’ll experience a home that warms up quick thanks to the boiler’s cast-aluminum heat exchanger. Even alone, this exchanger can transfer heat three times faster than those made with cast iron. An electronic ignition control will monitor water temperature and turn the boiler on only when necessary, so your home won’t be too hot or too cold. It’ll be just right. The GWB9-IH boiler will provide warmth quietly year after year with its sealed combustion. It’ll stay durable for years, too, because it was created with heavy-gauge steel and includes a baked-on paint finish. These features don’t add up to a massive machine. In fact, the GWB9-IH is compact and easy to install in smaller spaces. While we’re talking about installation, just have our staff at R & M Climate Control Service Experts Heating & Air Conditioning in Knoxville take care of that for you. When you buy through R & M Climate Control Service Experts, it just makes sense to have us do your installation and any other necessary HVAC work, too. Since we’re in Knoxville, we’ll be here when it’s time for a routine tune-up. Call 865-229-6176 or schedule a free appointment today so we can assist with all your GWB9-IH needs.