A2L Safe Charge - Superheat
R-454B PT Chart & Max Charge
About
This professional tool provides accurate refrigerant charging calculations for next-generation gases like R-454B and R-32. It features error-proof charging, a maximum allowable charge calculator, and offline reference materials for HVAC technicians.
What's New in A2L Safe Charge
2.0.0
August 2, 2026
Nameplate check against the room charge limit with a clear Within / Exceeds result and margin Charge tier guidance (m1 / m2 / m3) plus optional active-mitigation limit, with GPS-stamped PDF job tickets when location is available
MoreIn-App Purchases
$1.99
A2L SafeCharge Pro
PDF reports, unlimited history & company branding.
Developer apps
FAQ
What refrigerants does A2L Safe Charge support?
A2L Safe Charge fully supports next-generation refrigerants R-454B and R-32, in addition to R-410A. This makes it a versatile tool for modern HVAC systems.
How does A2L Safe Charge prevent charging errors?
The app automatically applies Dew Point for superheat and Bubble Point for subcooling on R-454B. This feature eliminates the most common A2L charging mistakes, ensuring accuracy.
Can I calculate safe refrigerant charge limits with A2L Safe Charge?
Yes, A2L Safe Charge includes an integrated Max Allowable Charge Calculator. You can enter room dimensions to instantly get your safe charge limit based on current A2L safety standards.
Does A2L Safe Charge require an internet connection?
No, A2L Safe Charge offers full offline reference capabilities. This includes P/T charts, refrigerant comparisons, and safety guides, meaning you can use it without cell service.
Can I generate reports with A2L Safe Charge?
Yes, you can generate professional, branded PDF field reports directly within A2L Safe Charge. These reports can include your company name and logo and be emailed to clients.
Is my data collected by A2L Safe Charge?
A2L Safe Charge is privacy-focused and collects no data. All information and calculations performed on the job site remain on your device.
What devices is A2L Safe Charge available on?
A2L Safe Charge is available for iPhone, iPad, and iPod. It is designed for iOS devices.
How often is A2L Safe Charge updated?
The latest version of A2L Safe Charge is 1.1.1, which was last updated on April 19, 2026. Updates typically address performance improvements and feature enhancements.