A typical propane refrigerator consumes between 1.1 and 1.8 pounds of propane per day of use, according to the website of manufacturers Unique Gas Products. Actual consumption is dependent on the model of refrigerator in question and the ambient temperature in the environment.
Higher ambient temperatures lead to higher fuel consumption for a propane refrigerator. The internal capacity of a propane refrigerator also influences the rate of propane consumption. For example, a large propane refrigerator on HomeTone's 2011 shortlist of best propane refrigerators had a capacity of 19 cubic feet and consumed 1.5 pounds of propane per day, while a smaller refrigerator from the same manufacturer used 1.1 pounds of propane to cool its interior volume of 10 cubic feet.
A propane refrigerator is more efficient at cooling if it is filled with food rather than empty space because this maximizes fuel efficiency. Oasis Montana recommends that a propane refrigerator be packed as tightly as possible with food at all times, as both the cooling process and the thermostat controlling the compressor work more efficiently under those conditions. If sufficient food is not available, adding sacks of ice to fill empty space in a propane refrigerator also improves fuel efficiency.