GWM-IE Boilers Offer the Highest Efficiency that will Keep You Warm For the most efficiency in boilers, choose the Lennox® GWM-IE high-efficiency, gas-modulating condensing water boiler. This product achieved ENERGY STAR® certification and a 95% AFUE efficiency rating, which is up to 40% more efficient than regular systems. The GWM-IE proves that sometimes, less is more. More efficiency, more savings, more comfort for your home. Technology is the secret to the GWM-IE’s efficiency. For example, these boilers include a modulating burner that operates primarily on a low-flame setting and adjusts as necessary. This produces an even temperature without turning on and off, which results in a quieter home. Further, the condensing water feature we mentioned earlier helps trap in heat that would otherwise be wasted, thanks to specially designed tubes in the vertical stainless steel heat exchanger. Since we have your attention, we’re now going to switch gears. The GWM-IE boiler is safer and more convenient than traditional boilers. A factory-installed low water cut-off switch allows for safe operation. A CPVC flue condensate collector minimizes the chances of corrosion and leaking. A wall-hung design makes it easy for you to save space with its wall mounting ability. We’re convinced...how about you? Browse through the GWM-IE boiler product brochure to learn even more. Our Rolf Griffin Service Experts Heating & Air Conditioning team in Fort Wayne will help you with whatever you need to purchase and install a new GWM-IE boiler. Add the most energy efficient and reliable boiler offered by Rolf Griffin Service Experts to your home. Schedule an appointment with one of our experts now.