With high temperatures expected in the 70s and 80s statewide today, no one in Iowa should be running their furnaces, but we’ll need them soon enough.Roy Goettig is an officer on the Iowa Association for Energy Efficiency a heating efficiency expert says Iowans should swap out their furnace filters now to save money when they flip the switch.Some predict monthly-heating bills could rise 50-percent this year due to elevated petroleum prices. Goettig says Iowans who think they may be in a financial bind can likely get a hand from the power company through “budget” payment plans.In addition to changing the furnace filters, Goettig says Iowans can make their homes more energy efficient by swapping out their screens for storm windows. He says many other common sense tasks don’t require the hiring of an expensive contractor.Caulking and weather-stripping door frames and windows is a start. Adding another layer of insulation to the attic is another big plus.