A2L Mitigation Changes the Math: Why Ducted Zoning Beats the Multi-Zone Mini-Split (Part 1)
Key Takeaways A2L Refrigerant Concentration Limits cap charge per occupied room: ASHRAE 34-2022 Addendum a sets the RCL at 4.8 lb/1,000 ft³ for R-32 and 3.1 lb/1,000 ft³ for R-454B (the value used in ASHRAE 15 mitigation math)¹. A...
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