I’ve always found it fascinating that in Canada we don’t have a system in our houses that use the naturally cold air outside (during the winter of course) to cool our fridges. I’m not the only one who has wondered this.
“…designed to provide such free cooling for walk-in coolers, freezers and cold storage warehouses. The system utilizes an electronic controller to finely tune the operation of standard refrigeration equipment, and this controller simply monitors the outdoor temperature and desired temperature settings and stops refrigerator evaporator fans when not needed, which also reduces the compressor’s refrigeration load. Proper airflow is maintained when the evaporator fans switch off by operating one or more energy-efficient circulating fans.”