Furnace Filters

Our winter was long and cold. We had a lot of snow and storms. Our furnace felt like it was running constantly. Bill will have to remove and replace our furnace filters this summer. I'm sure that they are filthy. It's nice because that is one job that is pretty easy to do. We just have to remember to purchase the new ones. Now a days most things can be boughten on the computer. Ease...........