How the R-410A to R-32 Refrigerant Change Affects New AC Installs
https://iris-wiki.win/index.php/What_a_Manual_J_Load_Calculation_Is_and_Why_It_Matters
If you have been shopping for a new air conditioning or heat pump system in 2025 or 2026, you may have noticed contractors mentioning refrigerant types — R-410A, R-32, R-454B — in ways that were never part of the conversation five years ago