Dual Fuel Systems Make Heating Even More Efficient. A number of the fuel systems we carry at B & G HVAC in Marshalltown improve your home’s efficiency more when they work together with another Lennox® system than they by themselves. This is the case with for our dual fuel capacity gas furnaces and heat pumps, which can pair up to offer higher efficiency and greater comfort for you. Both systems are great by themselves, 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 in accordance with 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 optimize your energy use, and you could lower your heating costs. Most times 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 641-812-2044. B & G HVAC is located in Marshalltown, 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.