GWB9-IH Boilers: High-Efficiency with Faster Heat Transfer If you’re in the market for a high-efficiency boiler, the Lennox® GWB9-IH is the model for you. This boiler has achieved ENERGY STAR® certification, meaning it meets or exceeds federal guidelines for energy efficiency. And that’s only the beginning. The GWB9-IH boiler also reached 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? First off, you could enjoy lower energy bills. But, you’ll also experience a home that heats up fast 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 will always be the perfect temperature. The GWB9-IH boiler will provide warmth quietly for years to come 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 bulky machine. In fact, the GWB9-IH boiler is compact and easy to install in smaller spaces. As long as we’re on the topic of installation, let our staff at Jack Nelson Service Experts Heating & Air Conditioning in Tulsa take care of that for you. When you buy through Jack Nelson Service Experts, it just makes sense to have us do your installation and any necessary HVAC repairs, too. Since we’re in Tulsa, we’ll be nearby when it’s time for an annual tune-up. Call 918-212-8927 or schedule a free appointment today so we can make your boiler replacement stress-free.