Dual Fuel Systems Make Heating Even More Efficient. Many of the fuel systems we carry at Patterson & Stirling Inc in Erie improve your home’s efficiency more when they work together with another Lennox® system than they do alone. The same is true for for our dual fuel capacity gas furnaces and heat pumps, which can pair up to deliver higher efficiency and greater comfort for your home. Both systems work well by themselves, but when you combine the gas furnace and the heat pump, you’re taking advantage of both gas and electric fuel. The two systems will alternate between electric or gas heat depending on your preferred 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 reduce 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. Read about the details of each of our gas furnaces and heat pumps here on our website, or give us a call at 814-833-5558. Patterson & Stirling Inc is located in Erie, so you can easily schedule an appointment to have us do an in-home consultation and show you how a dual fuel system could work for your home.