PDA

View Full Version : R -404 verses R- 507



kully
21-12-2010, 03:07 AM
Can anybody Tell me why R-507 seams to be loseing ground to R-404a? R-507 being an azeotrope, seems to me that would be reason enough to be the better choice.
Respectfully,
Kully
In the field since
1969

paul_h
21-12-2010, 03:24 AM
I prefer R507, but it seems all precharged gear comes in R404a, so manufacturers are making it more predominant. Probably something to do with duponts marketing.

flyinkiwi
21-12-2010, 05:53 AM
Most transport refrigeration equipment manufacturers prefer 404 too... damnit.