New Refrigerant 2025 Trane R22. The “ban” is on 14 seer (efficiency rating) units they’ve updated to a new seer2 rating, the new ones are around 15.5 seer and will use 410a till 2025. Tt), a global climate innovator, today introduced the completion of its redesign of the precedent® rooftop unit.

Stay informed to ensure compliance and optimize your. Get expert advice from trane.