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Key Takeaways The EPA's May 21, 2026 reconsidered Technology Transitions Rule relaxed Subpart B GWP installation thresholds — but left Subpart C (ALD and leak repair) completely unchanged. The January 1, 2026 ALD deadline for new equipment and January 1, 2027 deadline for existing 2017–2025 systems remain in full effect. HFC prices are rising due to the phasedown — operators who delay leak repair are now paying more for every pound of refrigerant lost. The common misconception that the TT...