A2L Refrigerant Resources

R-32 & R-454B

Videos

A2L Refrigerants R-454B and R-32 Explained! Bottles, Changes, Rules, Tools!

R-32 and R-454B Checking the Refrigerant Charge Scenarios! Practice for HVAC Techs!

A2L R-454B Leakage Sensor and Dissipation/Mitigation Board Wiring Install — Carrier/Bryant/Payne Unit!

More A2L videos on the AC Service Tech YouTube channel, including A2L refrigerant leak detection with a heated diode leak detector, whether you need A2L compatible tools, R-454B temperature glide, compressor differences, and pre-charge level changes on R-454B units.

Tools and Charts

• Refrigerant Weight Calculator
• Updated P/T Chart — includes R-32 and R-454B

Books and Cards

• 2nd Edition Refrigerant Charging and Service Procedures for Air Conditioning — paperback, covering new tools, procedures, and A2L refrigerants
• Companion 2nd Edition Workbook — over 1,600 questions across 6 question types, including image questions
• HVAC Quick Reference Cards — updated to include A2L P/T charts and refrigerant weight charts
• Ebook edition of the 2nd Edition

See also Charging Procedures and Refrigerant Weights.