Key Differences: Refrigerants vary in chemical composition, safety classification (flammability, toxicity), pressure, temperature, and environmental impact.
Safety Classifications:
Flammability:
Class 1: No flame propagation.
Class 2L: Low flammability.
Class 2: Mildly flammable.
Class 3: Highly flammable.
Toxicity:
Class A: Exposure limit over 400 PPM (less toxic).
Class B: Exposure limit under 400 PPM (more toxic).
Environmental Impact:
Ozone Depletion Potential (ODP): Measured relative to CFC-11 (baseline).
Global Warming Potential (GWP): Measured relative to CO₂ (baseline GWP of 1).
Chemical Composition:
HCFCs: Contribute to ozone depletion and global warming.
HFCs: No chlorine, but contribute to global warming.
HFOs: Environmentally friendly, low ODP and GWP, highly efficient.
Pressure-Temperature Relationship: Pressure and temperature charts are essential for field reference to determine optimal operating conditions for HVAC systems.
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