GWB9-IH Boilers: High-Efficiency with Faster Heat Transfer If you’re searching for a high-efficiency boiler, consider the Lennox® GWB9-IH boiler. This boiler has received ENERGY STAR® certification, which means it meets or exceeds federal guidelines for energy efficiency. But that’s not all. The GWB9-IH boiler also reached an AFUE rating of 90%, which means 90% of the fuel is converted to usable heat. High efficiency products are good for the environment, but what’s in it for you? First off, you could start seeing a decrease in your utility bills. Further, you’ll 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 will always be the perfect temperature. 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 bulky 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, just have our staff at Service Experts Heating & Air Conditioning in Raleigh take care of that for you. When you buy through Service Experts, it just makes sense to have us do your installation and any necessary HVAC repairs, too. Since we’re in Raleigh, we’ll be nearby when it’s time for a routine tune-up. Call 919-578-4329 or schedule a free appointment today so we can make your boiler replacement stress-free.