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. That’s an efficiency rating 40% higher than standard boilers! This unit proves that sometimes, less is more. More efficient, more savings, more comfort for your home. Technology is key to the GWM-IE’s efficiency. Some of this technology is shown through a modulating burner that operates primarily on a low-flame setting and makes adjustments as necessary. This produces an even temperature without turning on and off, which results in a quieter home. Additionally, the condensing water feature we mentioned earlier helps keep in the 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 standard boilers. A factory-installed low water cut-off switch allows for safe operation. A CPVC flue condensate collector safeguards against corrosion and leaking. A wall-hung design makes it easy to mount on the wall so you can save space. We’re convinced...how about you? Take a look at the GWM-IE boiler product brochure to learn even more. Our Bob Brown Service Experts Heating & Air team in Phoenix will help you with everything you need to purchase and install a new GWM-IE boiler. Add the most energy efficient and reliable boiler offered by Bob Brown Service Experts to your home. Schedule an appointment with one of our professionals today.