FORT WAYNE, Ind. (WOWO): It's time to fire up the furnace, but your energy bill might also be heating up. Leaders with NIPSCO say energy costs are rising this heating season, but most people's bills should only go up by $4. They say the cost prediction is based off of a normal winter season, so it could change depending on the weather. To cut down on costs, you can winterize your home by having your furnace checked or changing your filters.