ESCO Light Commercial Refrigeration Practice Exam 2026 – Complete Study Guide

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What is an alternative refrigerant to R-22 for new systems?

Freon-12

R-134A

R-410A is commonly used as a replacement for R-22.

R-410A is recognized as a commonly used replacement for R-22 in new refrigeration and air conditioning systems. This alternative refrigerant is a blend of two hydrofluorocarbons (HFCs)—R-32 and R-125. R-410A operates at higher pressures compared to R-22, which allows for improved energy efficiency and performance in cooling applications. Furthermore, R-410A does not contribute to ozone depletion, aligning with the environmental regulations aimed at phasing out ozone-depleting substances like R-22.

In addition to its efficiency and environmental benefits, R-410A systems have been designed with specific components that can handle the higher pressures associated with this refrigerant, ensuring that safety and efficiency standards are met. This makes R-410A a desirable choice for newer installations that comply with current environmental regulations.

R-404A

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