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 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 achieved 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? For starters, you could enjoy lower energy 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 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 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. It may seem like a lot, but all this doesn’t add up to a massive machine. In fact, the GWB9-IH is compact and easy to install in smaller spaces. Speaking of installation, leave it up to our professionals at Becht / Givens Service Experts Heating & Air Conditioning in Louisville take care of that for you. When you buy through Becht / Givens Service Experts, it just makes sense to have us do your installation and any other necessary HVAC work, too. Since we’re in Louisville, we’ll be nearby when it’s time for a routine tune-up. Call 502-785-8230 or schedule a free appointment today so we can make your boiler replacement stress-free.