Disclosed herein are embodiments of an energy recovery system for a freeze-drying system. In some embodiments, the freeze-drying system includes a freeze dryer chamber having one or more shelves disposed therein； a refrigeration system comprising a refrigerant condenser； a heat exchanger； a first fluid line to thermally couple the refrigerant condenser to the heat exchanger； and a second fluid line to thermally couple the one or more shelves to the heat exchanger.
