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 means 90% of the fuel is converted to usable heat. We know energy efficiency is great for the environment, but how does it actually affect you you? For starters, you could see lower utility bills. But, you’ll also experience a home that heats up quicker thanks to the boiler’s cast-aluminum heat exchanger. This exchanger is stunning – it alone 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 quietly warm your home for years to come with its sealed combustion. It’ll stay durable for years, too, since it was made with heavy-gauge steel and has a baked-on paint finish. These features don’t add up to a large machine. In fact, the GWB9-IH is compact and easy to install in smaller spaces. While we’re talking about installation, just have our experts at Norrell Service Experts Heating & Air Conditioning in Birmingham take care of that for you. When you buy through Norrell Service Experts, it just makes sense to have us do your installation and any other necessary HVAC work, too. Since we’re in Birmingham, we’ll be nearby when it’s time for your regular tune-up. Call 205-267-0023 or schedule a free appointment today so we can help with all your GWB9-IH needs.