MIL-PRF-13312 Refrigeration Units, Mechanical, Panel Mounted, 10,000 Btu For Refrigerator, Prefabricated, Panel TypeThis document covers two types of panel mounted, mechanical, refrigeration units having a capacity of 10,000 British thermal units \(Btu\) per hour and used with the prefabricated, panel type refrigerator \(see 6.1\).