🔍 Key Concepts

• R-22 (HCFC-22) refrigerant characteristics and common HVAC applications • Typical compressor types used in comfort air-conditioning (high temperature) systems • Which compressors are more common with low-temperature vs. high-temperature refrigeration

💭 Think About

• Think about which compressor types you most often see in standard building or residential air-conditioning units that use R-22. • Ask yourself: is R-22 limited to one style of compressor, or has it historically been used across multiple compressor designs? • Consider whether any of the listed compressor types are typically reserved for very large industrial plants or very low‑temperature systems rather than ordinary air‑conditioning.

✅ Before You Answer

• Identify which compressor types are commonly paired with R‑22 in real-world air‑conditioning systems (residential, commercial, and some industrial HVAC). • Check whether any of the compressor types listed are rare or unusual for typical R‑22 high‑temperature (A/C) applications. • Before choosing, confirm if R‑22 is restricted to a single compressor design or if its properties allow use in several compressor types.