Capacity differences between refrigerant types - any rules of thumb?

G'day,

I'm constantly trying to source items that only list capacities for a specific type of refrigerant, whereas our use is another type of refrigerant. For example an evaporator might be rated at 3500W @ -5C / 6KTD on R404A, but I need to use it for R134a.

Is there an easy way to convert between refrigerant types? The latest one I'm trying to work out is an R22 compressor (they still make them!) that needs to be run on R134a.

submitted by /u/theredkrawler
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