As the air outside gets cooler and we’re working to keep our homes warmer inside, consider if you actually use your fireplace during the fall and winter months. If you never use it, plug and seal the chimney flue. Warm air rises up and out of the house, and the No. 1 place it does so is through the chimney. By plugging the flue, you'll prevent air from escaping and help reduce heating costs. Plus, it’s not permanent: If you ever want to use the fireplace again, the plug can be removed easily.