Last updated: 2026-09-04
By using Superheat & Subcool - PT Chart you agree to these terms.
Superheat, subcooling, target values and Add / Remove / OK indications are calculation aids based on published pressure-temperature data and industry formulas. They do not replace the equipment manufacturer's charging specification, your training, or applicable safety and environmental regulations (including EPA Section 608). You are responsible for the readings you enter and the work you perform.
A2L and A3 refrigerants require rated equipment and procedures. The app does not assess site safety.
ChargeNote Pro is an auto-renewing yearly subscription billed through your Apple ID. New subscribers who are eligible start with a 7-day free trial; the first yearly charge is taken when the trial ends, unless you cancel at least 24 hours before it ends. After that it renews yearly unless cancelled at least 24 hours before the end of the period. Manage or cancel it in your Apple ID settings.
The app is provided "as is" without warranty of any kind. To the maximum extent permitted by law, Youlongtang is not liable for any damage arising from use of the app.
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