GWB9-IH Boilers: High-Efficiency with Faster Heat Transfer If you’re looking for a high-efficiency boiler, consider the Lennox® GWB9-IH boiler. This boiler has achieved ENERGY STAR® certification, which means 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 translates to 90% of the fuel being converted to usable heat. High efficiency products are good for the environment, but what’s in it for you? First off, you could see lower utility bills. Another nice benefit is that you may experience a home that heats up fast thanks to the boiler’s cast-aluminum heat exchanger. This exchanger alone transfers 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 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 boiler is compact and easy to install in smaller spaces. As long as we’re on the topic of installation, just have our experts at Service Experts Heating & Air Conditioning in Longmont take care of that for you. When you buy through Service Experts, it just makes sense to have us do your installation and any other necessary HVAC work, too. Since we’re in Longmont, we’ll be nearby when it’s time for your regular tune-up. Call 303-647-5749 or schedule a free appointment today so we can help with all your GWB9-IH needs.