I recently read an post in a regional HVACR newspaper that rather addressed this problem, which i guess we all should have foreseen coming due to the fact that R22 is getting very scarce and also its price is skyrocketing.

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According to the article, many building contractors have started adding R410a to R22 solution that have experienced refrigerant losses. Apparently, contractors say they have been called by their suppliers and even some refrigerant manufacturers reps that this is a viable plan. The article likewise states refrigerant manufacturers are merely discouraging the practice.


I guess i was blindsided through the introduction of this happening because I recognize the great differences in between the refrigerants. I simply thought no one would certainly be foolish sufficient to try such a thing. However if you don’t know and you’re desperate, ns guess anything becomes possible.

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Anyhow, i sent an e-mail to a major refrigerant manufacturer’s engineering department come ask part questions. After a couple days, a woman referred to as me. Her an initial reply to be typical, “We don’t endorse the mixing of refrigerants.” Ooh, that’ll avoid them!

That wasn’t enough for me for this reason I continued to press for answers. Ns was then told you can’t return combined refrigerants for reclaim because they can’t be separated and also will need to be destroyed. Again, due to the fact that so few contractors are recovering R22, the isn’t much of a concern.


Next, ns was called there are no charging charts for unknown blends of refrigerants. But due to the fact that so couple of service techs count on charging charts, that worry is moot.

After that i was told, “The pressures of R410a are much greater so any kind of leaks will become an ext pronounced.” not too strong of one argument.

And finally, i was educated R410a will make any type of rubber seals (such together in Schrader valves) smaller, again result in much more leaks.


Was the it? does it simply come under to more leaks and recovery problems? Well, she couldn’t answer the only question ns asked, “Will R22 evaporate under the much higher vapor press of R410a?”

Understand this: The mineral oil in a compressor has actually a vapor pressure. Yet, when you introduce R22 to the mineral oil, the reduced vapor push of the oil doesn’t reduced the vapor push of the refrigerant. Yet, the firm spokesperson assured me that mixing R410a and also R22 combines your pressures and reaches a lower median.

Is that true? not according to the gas laws I supplied to teach. Rather, the publications I taught from say the each refrigerant get its very own vapor pressure. If it is so, then what R22 over there is in the system can never evaporate under the higher suction push of R410a. That will just flood back to minimize the compressor life and will substantially reduce the system capacity.

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Do I have an answer? No, yet I doubt that mixing the 2 refrigerants is a disastrous idea. The refrigerant manufacturers representative couldn’t offer me a critical answer due to the fact that she claimed nobody has simulated such a problem to see what in reality happens, add to she wasn’t sure anyone would have the time to carry out so. Meanwhile, hundreds, thousands and also soon countless air conditioners may be contaminated in this way.

 She stated she’d get back to me. You’re analysis this write-up because she didn’t.