Dual Fuel Systems Make Heating Even More Efficient. Several of the fuel systems we carry at Twin Air LLC in Manassas boost your home’s efficiency more when they work in partnership with another Lennox® system than they by themselves. The same is true for for our dual fuel capacity gas furnaces and heat pumps, which can be combined to provide higher efficiency and greater comfort for your family. Both systems operate efficiently alone, but when you marry the gas furnace and the heat pump, you’re taking advantage of both gas and electric fuel. The two systems will switch between electric or gas heat based on your chosen indoor air temperature and the operating efficiency of each unit. This works the same way as a hybrid car, alternating between electric power at low speed and gas power with increased demand for maximum MPG. You’ll be able to improve your energy use, and you could lower your heating costs. Typically the electric heat is used until the outdoor temperatures fall to about 32 degrees Fahrenheit before switching to gas. Not only will you feel comfortable, but you can feel good about the efficiency of your dual fuel systems, too. Learn more about the details of each of our gas furnaces and heat pumps here on our website, or give us a call at 703-754-1062. Twin Air LLC is located in Manassas, so you can easily arrange an appointment to have us do an in-home consultation and show you how a dual fuel system could work for your home.