New Residential Refrigerant 2025. Trane’s new line of residential hvac equipment won’t just use refrigerant that lowers your carbon footprint — new design features on many models help systems operate more efficiently,. In 2025, homeowners will see a major change in the hvac industry as two new refrigerants, r32 and r454b, become the primary options in new air conditioning systems.
Refrigerant changes coming in 2025: Starting january 1, 2025, residential and light commercial acs and heat pumps must use new refrigerants, known as a2ls.