I'm coming across several old reach in and walk in coolers with r-12 replacements in them. A couple of the restraunts i do regularly have 401,409,and 414 in the same kitchen. With the price of refer, and the fact it may take awhile to sell a whole jug worth here is the question.
I want to buy iether 409a, or 414b and just get everything switched over to the same refer as things fail/need worked on. So medium temp walk in's and reach ins would you buy 409 or 414 or does it really matter much? They have all already been converted from r12, so iether way should be straight forward. I can only afford one or the other. thanks