HVAC EPA Certification 2025 – 400 Free Practice Questions to Pass the Exam

R-134A refrigerant is commonly found in domestic refrigerators. This refrigerant was introduced as a more environmentally friendly alternative to R-12, which is a chlorofluorocarbon (CFC) known to contribute to ozone depletion. Domestic refrigerators utilize R-134A because it has satisfactory thermodynamic properties and a low environmental impact compared to older refrigerants.

Refrigerators operate by transferring heat from the inside of the appliance to the exterior, and R-134A efficiently performs this function within the temperature range needed for food preservation. The choice of refrigerant is critical in designing an efficient and effective cooling system, and R-134A has been widely adopted for its balance of performance and safety.

Other appliances listed, such as window air conditioning units or commercial freezers, may also use different refrigerants or may use R-134A but are not as commonly associated with it. Heating systems typically do not use refrigerants in the same capacity as refrigeration and air conditioning systems.

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