Gas fireplaces, stoves and inserts should receive an annual inspection and cleaning from your licensed technician. It’s recommended to have the company/individual who installed the appliance perform any service or maintenance as they are familiar with your product and the installation and will have access to any potential parts that may be required.
Wood fireplaces, stoves and inserts should also be inspected annually along with at least one chimney sweep a season. A WETT-certified sweep/inspector is your best resource for a thorough annual inspection and cleaning. (WETT stands for Wood Energy Technology Transfer and is a non-profit education and training association.)