Refrigerating and Air Conditioning Evaporators – Commercial
Early, heavy copper tube and fin static evaporator with double dip galvanised coating for large “walk-in” refrigerated room, equipped with low-side float and suction line chamber, for low pressure SO2 refrigerant, Frigidaire, Circa 1926.
Features:
Matching set of two coils typically used in tandem
Technical Significance:
Refrigerated storage rooms for perishable foods were designed predominantly for high pressure refrigerant, commonly ammonia, in the early years of the 20th century. With the successful entry of lower pressure refrigerants, notably SO2, into the market place, the market was significantly expanded, opening it up to smaller commercial installations, which did not require operating engineers. Food stores, dairies and refrigerated warehouses would welcome the trend. So to the public who would see on the market a whole new range of foods for their health and enjoyment.
