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LATEST!! HVAC: EPA 608 Certification Study Guide |Question and Answer| 100% Correct
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LATEST!! HVAC: EPA 608 Certification Study Guide |Question and Answer| 100% Correct Are there drop-in replacements for R-12 systems? Why or why not? *Ans* No because the new refrigerants are incompatible with the oils and lubricants used in R-12 systems. What type of oil is used in R-134a an...
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