Rinnai America Corporation v. South Coast Air Quality Management District
Key claim: The U.S. Court of Appeals for the Ninth Circuit decided an opinion on July 2, 2026 in Rinnai America Corporation v. South Coast Air Quality Management District.
Abstract
U.S. Court of Appeals for the Ninth Circuit opinion decided 2026-07-02.
Why this matters
Litigation over local air-district rules that push appliances toward zero-NOx (and effectively toward electrification) sits at the intersection of Clean Air Act emissions authority and federal appliance energy conservation preemption under EPCA. A Ninth Circuit ruling in Rinnai v. SCAQMD could shape how far regional air regulators can go in constraining combustion appliances to meet ozone/NAAQS obligations, with direct consequences for compliance costs, product availability, and building-sector emissions pathways.