A2L Safe Charge - Superheat

The field calculator built for the A2L transition.

Legacy Check & Charge is gone, and its replacement now needs a login just to run a superheat calculation. A2L Safe Charge is the same fast, no-account tool techs relied on — rebuilt for R-454B and R-32, with the one thing most field apps quietly skip: handling A2L glide correctly, automatically.

WHY TECHS SWITCH -Built on NIST REFPROP data — the same thermodynamic reference OEMs use, cited on every result, not a proprietary chart -Automatically uses dew point for superheat and bubble point for subcooling on R-454B — the #1 A2L charging mistake, handled for you -Superheat and subcooling calculator for R-454B, R-32, and R-410A -Enter your OEM nameplate target and see how your reading compares instantly -Max allowable charge calculator — enter room dimensions and unit location, get a passive charge limit based on A2L safety guidelines -Save job history and export a professional one-page PDF field report with your company branding -A2L quick reference — refrigerant comparison, bubble/dew point explainer, and A2L safety rules — all offline

BUILT FOR THE FIELD No account, no login, no signal required. Basement, attic, mechanical room with zero bars — it opens fast and gives you a clear answer. Your job data stays on your phone.

100% FREE Every feature is included — calculators, history, PDF reports. A small ad keeps it free. No subscriptions, no paywalls, no upsells.