 Have you noticed your furnace filter is extra dirty? John at the Duck Hunter recommends changing your filter every three months. If your furnace filter has been consistently dirty, you may want to have your air ducts cleaned, too. Make sure you don't fall for the social media scammers. Call a Logan-based business, the Duck Hunter, for a free quote at 435-770-4813. We are the Duck Hunter. We better save money, protect your home.