GWB9-IH Boilers: High-Efficiency with Faster Heat Transfer If you’re searching for a high-efficiency boiler, the Lennox® GWB9-IH is the model for you. This boiler has earned ENERGY STAR® certification, so it’s met the highest 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. High efficiency products are good for 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 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 will always be the perfect temperature. The GWB9-IH boiler will provide warmth quietly year after year with its sealed combustion. It’ll stay durable for years, too, having been created with heavy-gauge steel and receiving a baked-on paint finish. The benefits are plentiful, but they don’t add up to a large machine. In fact, the GWB9-IH boiler is compact and easy to install in smaller spaces. While we’re talking about installation, let our staff at BW/Cook Service Experts Heating & Air Conditioning in Elkhart take care of that for you. When you buy through BW/Cook Service Experts, it just makes sense to have us do your installation and any necessary HVAC repairs, too. Since we’re in Elkhart, we’ll be here when it’s time for your regular tune-up. Call 574-218-6404 or schedule a free appointment today so we can assist with all your GWB9-IH needs.