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The primary advantage of using R-410A refrigerant over R-22 is:

  1. Higher energy efficiency

  2. Lower cost

  3. Lower global warming potential

  4. Smaller equipment size

The correct answer is: Higher energy efficiency

The correct answer is A. Higher energy efficiency. R-410A refrigerant is known for its superior energy efficiency compared to R-22 refrigerant. It allows air conditioning systems to operate with less energy consumption, leading to lower utility bills for the users. This makes R-410A a more environmentally friendly option in terms of energy efficiency, which is a significant advantage over R-22.