I newly read an post in a neighborhood HVACR magazine that somewhat addressed this problem, which ns guess we all should have actually foreseen coming due to the fact that R22 is getting really scarce and its price is skyrocketing.

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According come the article, many home builders have started including R410a come R22 systems that have experienced refrigerant losses. Apparently, home builders say they have actually been told by your suppliers and even part refrigerant manufacturers reps the this is a viable plan. The article likewise states refrigerant manufacturers are just discouraging the practice.


I guess ns was blindsided by the introduction of this happening since I understand the good differences between the refrigerants. I simply thought no one would be foolish sufficient to shot such a thing. However if you nothing know and you’re desperate, i guess anything i do not care possible.

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Anyhow, ns sent an email to a significant refrigerant manufacturer’s design department come ask part questions. ~ a couple days, a woman dubbed me. Her an initial reply to be typical, “We don’t endorse the mixing of refrigerants.” Ooh, that’ll protect against them!

That wasn’t enough for me so I ongoing to press for answers. Ns was climate told you can’t return mixed refrigerants because that reclaim because they can not be separated and will have to be destroyed. Again, since so couple of contractors room recovering R22, the isn’t much of a concern.


Next, ns was said there space no charging charts because that unknown blends the refrigerants. But because so few service techs count on charging charts, that issue is moot.

After that i was told, “The pressure of R410a room much greater so any type of leaks will certainly become more pronounced.” not too solid of one argument.

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


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

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

Is the true? no according come the gas laws I provided to teach. Rather, the publications I taught from say that each refrigerant reaches its own vapor pressure. If it is so, climate what R22 there is in the system deserve to never evaporate under the higher suction press of R410a. It will simply flood earlier to minimize the compressor life and will greatly reduce the system capacity.

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Do I have an answer? No, yet I suspect that mix the two refrigerants is a terrible idea. The refrigerant manufacturers representative couldn’t offer me a definitive answer due to the fact that she claimed nobody has simulated together a problem to see what actually happens, plus she wasn’t certain anyone would have actually the time to do so. Meanwhile, hundreds, thousands and also soon numerous air conditioners might be contaminated in this way.

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