GWB9-IH Boilers: High-Efficiency with Faster Heat Transfer If you’re looking for a high-efficiency boiler, the Lennox® GWB9-IH is the model for you. This boiler has achieved ENERGY STAR® certification, so it’s met the highest federal guidelines for energy efficiency. And that’s only the beginning. The GWB9-IH boiler also achieved an AFUE rating of 90%, which translates to 90% of the fuel being converted to usable heat. We know energy efficiency is great for the environment, but what does it really mean for you? First off, you could start seeing a decrease in your utility bills. Another nice benefit is that you may experience a home that heats up fast thanks to the boiler’s cast-aluminum heat exchanger. This exchanger alone transfers 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 heat your home with minimal operating sounds 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. As long as we’re on the topic of installation, let our professionals at Roy Inch & Sons Service Experts Heating & Air Conditioning in London take care of that for you. When you buy through Roy Inch & Sons Service Experts, it just makes sense to have us do your installation and any necessary HVAC repairs, too. Since we’re in London, we’ll be close when it’s time for your regular tune-up. Call 226-270-1164 or schedule a free appointment today so we can assist with all your GWB9-IH needs.