Cold storage systems

A cold storage system comprising:

• a housing including:
• a chamber having a front opening that is closeable by an outer door and a back wall opposite the front opening;
• one or more outlets defined in the back wall;
• one or more inlets defined in the chamber that are more proximate the front opening than the back wall;
• a door jamb extending around the front opening, the door jamb comprising:
• a first door stop defining a first seal surface;
• and
• a second door stop defining a second seal surface, the second door stop being parallel to and discontinuous from the first door stop such that the first door stop and the second door stop are configured to thermally contract independently of one another,
• wherein the first door stop and the second door stop comprise one or more elongate segments, and wherein the door jamb further comprises an elongate connecting member arranged between corresponding segments of the first door stop and the second door stop such that the corresponding segments of the first door stop and the second door stop are configured to expand or contract longitudinally relative to the elongate connecting member;
• and
• a refrigeration module operably coupled to the chamber, the refrigeration module including:
• an evaporator positioned vertically higher than the chamber;
• a blower that is configured to generate an airflow that is in thermal communication with the evaporator;
• and
• ducting that is configured to circulate the airflow between the chamber and the evaporator via the one or more inlets and the one or more outlets such that the airflow is directed through the one or more outlets into the chamber and then from the chamber into the one or more inlets to cool the chamber.