 Have you noticed your furnace filter is extra dirty? John at The Duct 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 Duct Hunter, for a free quote at 435-770-4813. We are The Duct Hunter. We better save money, protect your home.