Refrigeratnts

R-407C is one of the most common HFC refrigerants in air conditioning, and one of the main options techs use when an R-22 system gets converted instead of replaced. If you service R-407C equipment, or you're weighing an R-22 retrofit, this guide covers what R-407C is, where it's used, what a retrofit involves, how it compares with R-22 and R-410A, and how to buy it. [...]