R32:
Composition: HFC with a global warming potential (GWP) under 700 (half the impact of most current refrigerants).
Safety Classification: A2L (mildly flammable, low toxicity).
Key Note: Not a drop-in replacement for R410A, requiring careful installation and maintenance due to flammability concerns.
R454B:
GWP: Under 500, making it a more environmentally friendly option.
Safety Classification: A2L (mildly flammable, low toxicity).
Use: Chosen by several manufacturers as a replacement for R410A in both ducted and ductless systems.
Outlook: Both R32 and R454B are leading contenders for future refrigerants due to their lower environmental impact, despite requiring careful handling due to flammability.
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