With an efficiency of up to 95% AFUE, the GWM-IE boiler can mean several hundred dollars per year in energy savings. This product has been designated as one of the Most Efficient ENERGY STAR certified products in 2018. Products that are recognized as the Most Efficient of ENERGY STAR in 2018 prevent greenhouse gas emissions by meeting rigorous energy efficiency performance levels set by the U.S. Environmental Protection Agency.
Efficiency Rating (AFUE): up to 95
ENERGY Qualified: ENERGY STAR®
Warranty: 15-Year Limited Warranty on Heat Exchanger; 10-Year Limited Warranty on covered components
Fuel Source: Natural gas
Ignition: Direct Spark
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