Furnaces in Central Ohio homes get a break during the summer months. But with fall in full swing and winter a short time away, most home thermostats have triggered furnaces to begin cycling on again. To keep your furnace in good working order and your family safe from potentially deadly carbon monoxide (CO), it’s a good idea to make sure your furnace flue or exhaust pipe is completely clear. If it is obstructed, even partially, with an animal nest or other material, it can effect furnace performance and cause CO levels to rise in your home. Changing the filter promotes your furnace’s ability to operate efficiently and also improves the quality of air emitted from ducts. Lastly, make sure the space around your furnace has not become a storage area over the summer. Maintain a clear area of at least 3 feet from the furnace in all directions.