R404A yog qhov sib xyaw ntawm HFC125, HFC-134A thiab HFC-143, nrog qhov piv ntawm R404A=44 feem pua R125 ntxiv rau 4 feem pua R134A ntxiv rau 52 feem pua 143A. Cov roj tsis muaj xim ntawm chav sov, cov kua tsis muaj xim tsis muaj xim ntawm nws tus kheej siab, R-404A yog haum rau nruab nrab thiab qis kub cov khoom siv tub yees tshiab, cov khoom siv thauj tub yees lossis cov khoom siv hloov pauv. Ze tshaj rau R-502, lub tub yees no haum rau txhua qhov chaw uas R-502 tuaj yeem ua haujlwm ib txwm.
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