The furnace efficiency benchmarks set 2015 required an Annual Fuel Utilization Efficiency (AFUE) rating of 80%. This rating gauges the furnace's ability to convert natural gas into warmth. An 80% AFUE means 20% of the fuel is wasted during heat generation.
As the sweltering summer heat sets in, there's nothing quite as refreshing as stepping into a cool, air-conditioned space. However, to ensure your air conditioning system continues to function optimally and keeps you comfortable, regular maintenance is crucial.