The fall is a period when people often schedule important HVAC services, such as regular maintenance for the heating system and replacing an aging air conditioner after a long summer. One HVAC task that you might think of arranging for this fall is to have professionals clean the air ducts. You don’t need to have this service done every year, but if more than a few have passed since the last time you arranged to have professional duct cleaning, now is definitely the time to consider getting it taken care of.