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 earned ENERGY STAR® certification, so it’s met the highest federal guidelines for energy efficiency. And that’s only the beginning. The GWB9-IH boiler also produces an AFUE rating of 90%, which translates to 90% of the fuel being converted to usable heat. We know energy efficiency is great for the environment, but what’s in it for you? Well, you could start seeing a decrease in your utility bills. But, you’ll also 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 suffer from heating and cooling inconsistencies – it’ll always be just the temperature you want. The GWB9-IH boiler will heat your home with minimal operating sounds year after year 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 large machine. In fact, this boiler is compact and easy to install in smaller spaces. As long as we’re on the topic of installation, leave it up to our professionals at Knochelmann Service Experts Heating & Air Conditioning in Cincinnati take care of that for you. When you buy through Knochelmann Service Experts, it just makes sense to have us do your installation and whatever HVAC repairs come up down the road, too. Since we’re in Cincinnati, we’ll be close when it’s time for a routine tune-up. Call 513-273-5771 or schedule a free appointment today so we can help with all your GWB9-IH needs.