HVAC Toolkit: PT & Superheat

HVAC Field Toolkit is an offline field suite for residential and light-commercial HVAC techs in North America and Europe — charging math, PT lookup, psychrometrics, and EPA Section 608 study in one app, even without cell signal.

Not just another superheat calculator: work rooftops and mechanical rooms with a toolkit built for EPA-minded techs who need results they can share.

FREE TOOLS
• Superheat and subcooling with °F/°C and psi/bar/kPa switching — TXV vs fixed-orifice paths
• PT charts for common refrigerants — R-410A, R-32, R-454B, R-22, R-134a, R-448A, R-507A, R-717, R-290, and more
• Zeotropic blends: bubble (liquid) and dew (vapor) so SH uses dew and SC uses bubble
• Psychrometric calculator: dry bulb, wet bulb, dew point, RH, enthalpy, humidity ratio
• Delta T, temperature/pressure converters, voltage drop
• Refrigerant reference cards, favorites, and recent tools
• One free PDF export preview to try job-site sharing

PRO — ONE-TIME UNLOCK ($9.99)
• EPA Section 608 study: Core / Type I / II / III practice and timed exams
• Target superheat for fixed-orifice charging (generic field chart — prefer OEM when available)
• Named Jobs: save and reopen field calculations
• Unlimited PDF reports to share with customers or the shop
• Duct sizing (equal friction / Manual D–style helpers)
• Airflow and run-capacitor checkers
• Remove banner ads

BUILT FOR THE FIELD
• Light and dark themes, readable industrial UI
• Local history and favorites on device — no account for core tools
• 18 languages for crews that work across regions

IMPORTANT
Target superheat values are a generic approximation for fixed-orifice systems. Manufacturer charging charts (Carrier, Trane, Goodman, Lennox, and others) can differ. TXV and EEV systems should be charged by subcooling per OEM instructions. PT data is field-grade for service work, not a laboratory REFPROP substitute.

Download HVAC Field Toolkit — EPA study, offline PT/SH/SC, Jobs, and PDF reports in one $9.99 unlock.