Refrigerant Rules
HFC phasedown, A2L requirements and what changed.
HFC Rules in 2026: What the AIM Act Means for HVAC Techs
The 2026 state of the HFC phasedown, the R-410A installation rule change, and the new 15-pound leak-repair rules, explained for service techs.
Servicing R-22 Systems in 2026: Recharging, Retrofits and Repair-or-Replace
What you can and can't do with an R-22 air conditioner or heat pump today, where R-22 comes from now, how retrofit refrigerants work, and how to help a customer decide between repair and replacement.
R-32 vs. R-454B: The Differences That Matter on a Service Call
Side-by-side comparison of R-32 and R-454B for techs, covering composition, GWP, pressures, glide, discharge temperature, charging and safety.
R-454B for Technicians: Pressures, Charging, Tools and Safety
What changes when you service R-454B, the A2L that replaced R-410A in many new systems, from glide and liquid charging to A2L tools and leak sensors.