CHICAGO, IL — When a project consists of 430,000 square feet of refrigerated space, conventional wisdom would suggest a cooling system consisting of a large mechanical room with a refrigerant such as ammonia.
But the new International Produce Market on Chicago’s near West Side is going against convention. Instead of a mechanical room, there are more than 100 rooftop condensing units. Instead of ammonia, the refrigerant of choice is R-22.