HVAC Regulation AnalysisRegulations, Policy & SafetyEPA Lifted an R-410A Deadline. Washington Contractors Still Need a State-Level Check.Federal relief for qualifying older R-410A inventory does not answer every Washington installation question. The state's current rules include a two-year sell-through provision, equipment definitions and separate leak-management duties that contractors need to distinguish.TradeVulcan Dispatch Editorial Desk7 min