Wednesday, Jan. 29, 2003: Alternative Refrigerant Information From DuPont January 29, 2003 DuPont offers a selection guide for retrofitting R-22 equipment, indicating the benefits of R-404A, -407C and -507. Share This Story You must login or register in order to post a comment. Report Abusive Comment Thank you for helping us to improve our forums. Is this comment offensive? Please tell us why.
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