To keep food cold in walk-in coolers, it’s essential to prevent cold air from escaping, which is ensured by door closers located at the top of the door for an airtight seal. While requiring minimal maintenance, a monthly check of the hook and roller is recommended. According to U.S. Department of Energy standards, all walk-in coolers and freezers must have door closers. At Tenlight Energy, we retrofit doors without closers to enhance energy efficiency, installing our custom-made, high-quality door closers.