Using this carbon filter is easy. Just remove the old filter from your Westinghouse or Chef RRC600, RRC630, or RRC660 series retractable rangehood and insert the new one in its place. Make sure it fits snugly. As for maintenance, check the filter regularly for dirt and debris. If it looks dirty, it's time to replace it. Don't try to clean it as it won't work as effectively. Also, keep it in a dry place when not in use. This will help ensure your rangehood continues to work well and keep your kitchen smelling fresh.