Summer always seems to come to an abrupt end in Ohio, leaving homeowners wondering when they should turn on their furnace system. The real answer is that it depends. The World Health Organization recommends not letting the home drop below 64.4 degrees on average or 69.8 degrees if kids or someone elderly live in the home. Of course, personal preference plays a factor, and you may like keeping your home a little warmer than your neighbor. When you are ready to turn on the furnace, use these tips from Allied Service, Inc. to ensure everything is in working order.