sizing evaporator to condensing unit

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Dear
Suppose we have a condensing unit (7 tons -20F) independently of others parameters (load, humidity, distance, superheat …) what is the evaporator for this condensing unit at -20F?
Thanks in advance

[Peter_1]

You say independent: load, humidity, SH ... ARE some of the inside cold room parameters you need to calculate you evaporator. They are the determining parameters to calculate the evaporator.
If your compressor can pump 20T at a pressure corresponding to -20°F, how big then must your evaporator be you think? The compressor is getting these 20T from somewhere, so...

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I think the evaporator must match the condensing unit i.e 20T at -20F also