GWB9-IH Boilers: High-Efficiency with Faster Heat Transfer If you’re searching for a high-efficiency boiler, look no further than the Lennox® GWB9-IH. This boiler has received ENERGY STAR® certification, meaning it meets or exceeds federal guidelines for energy efficiency. But there’s more. The GWB9-IH boiler also achieved 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 does it really mean for you? For starters, you could start seeing a decrease in your utility bills. Further, you’ll experience a home that warms up quick 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 quietly warm your home for years 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. It may seem like a lot, but all this doesn’t add up to a large machine. In fact, this boiler is compact and easy to install in smaller spaces. While we’re talking about installation, just have our staff at McKinley Heating Service Experts Heating & Air Conditioning in Edmonton take care of that for you. When you buy through McKinley Heating Service Experts, it just makes sense to have us do your installation and any other necessary HVAC work, too. Since we’re in Edmonton, we’ll be nearby when it’s time for a routine tune-up. Call 780-800-7092 or schedule a free appointment today so we can assist with all your GWB9-IH needs.