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 achieved ENERGY STAR® certification, meaning it meets or exceeds federal guidelines for energy efficiency. But there’s more. 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 see lower utility bills. Further, you’ll experience a home that heats up fast 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 heat your home with minimal operating sounds for years 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. The benefits are plentiful, but they 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 Golden Seal Service Experts Heating & Air Conditioning in Saint Charles take care of that for you. When you buy through Golden Seal Service Experts, it just makes sense to have us do your installation and any other necessary HVAC work, too. Since we’re in Saint Charles, we’ll be close when it’s time for a routine tune-up. Call 630-246-2698 or schedule a free appointment today so we can make your boiler replacement stress-free.