GWB9-IH Boilers: High-Efficiency with Faster Heat Transfer If you’re looking 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 achieved an AFUE rating of 90%, which leads to 90% of the fuel used is converted to heat. We know energy efficiency is great for the environment, but how does it actually affect you you? Well, you could enjoy lower energy bills. Another nice benefit is that you may 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 won’t be too hot or too cold. It’ll be just right. 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. It may seem like a lot, but all this doesn’t add up to a large machine. In fact, the GWB9-IH is compact and easy to install in smaller spaces. Speaking of installation, just have our staff at Fras-Air/General Service Experts Heating & Air Conditioning in Hillsborough take care of that for you. When you buy through Fras-Air/General Service Experts, it just makes sense to have us do your installation and any necessary HVAC repairs, too. Since we’re in Hillsborough, we’ll be close when it’s time for an annual tune-up. Call 908-448-2154 or schedule a free appointment today so we can assist with all your GWB9-IH needs.