The Benefits of Modulating Furnaces by Mike Rampey | May 19, 2017June 5, 2017 Often when you hear about combustion furnace options, fuel efficiency is the main metric thrown around. These are usually shown in terms of AFUE (annualized fuel utilization efficiency) percentage, in […]Read More Filed Under: Furnaces Tagged With: furnaces– Heating– heating system– HVAC– modulating furnaces