Efficiency is an important word when it comes to HVAC systems. People want to make sure they have heating and air conditioning units that waste as little energy as possible. This not only keeps utility bills lower, it’s better for the environment because it puts less strain on power plants and natural resources. The US Department of Energy has a program called ENERGY STAR to help consumers identify products with superior energy efficiency and quality features. When you’re hunting for a new heating system or other HVAC product, look for the ENERGY STAR label.
But you’ll also want to look at the actual efficiency rating of the appliance, and this can become a bit confusing because different appliances have different criteria. Sometimes, efficiency ratings can be misleading without some extra information—and this is the case with the two most common types of furnaces, gas and electric.