HVAC Refrigerant PT vs Digiduct

HVAC Refrigerant PT™ is the pressure–temperature reference built for working HVAC/R technicians and engineers. PT charts, superheat and subcooling calculations, and refrigerant data for 55 refrigerants — fast, accurate, and fully offline. No account, no ads, no internet required at the job site. PRESSURE–TEMPERATURE CHARTS Scroll or jump to any temperature and read saturation pressure instantly. Zeotropic blends show bubble (liquid) and dew (vapor) pressures side by side on the same line, so you charge and troubleshoot with the correct value — not an average. Temperature glide is right where you need it. SUPERHEAT & SUBCOOLING CALCULATOR Enter your gauge pressure and line temperature to get measured superheat or subcooling in seconds. For fixed-orifice systems, enter indoor wet-bulb and outdoor dry-bulb to get target superheat and a clear charge verdict. TXV/EEV systems check subcooling against the manufacturer's target. A reverse saturation lookup converts any pressure to its bubble and dew temperatures. REFRIGERANT DATA Every refrigerant includes classification, safety rating, cylinder color code, critical temperature and pressure, liquid and vapor density, specific heat, heat of vaporization, ozone depletion potential, GWP, common applications, and recommended lubricant. YOUR UNITS, YOUR STANDARDS Fahrenheit or Celsius. Seven pressure units: psig, psia, kPa, inHg, atm, bara, barg — matched to your gauges and local code. 55 REFRIGERANTS R-11, R-12, R-13, R-22, R-23, R-32, R-123, R-124, R-134a, R-290, R-401A, R-401B, R-402A, R-402B, R-403B, R-404A, R-407A, R-407C, R-407F, R-408A, R-409A, R-410A, R-414B, R-416A, R-417A, R-417C, R-422A, R-422B, R-422C, R-422D, R-427A, R-430A, R-431A, R-436A, R-438A, R-448A, R-449A, R-452A, R-452B, R-454B, R-454C, R-455A, R-500, R-502, R-503, R-507, R-508B, R-513A, R-514A, R-600a, R-717, R-744, R-1233zd, R-1234yf, R-1234ze From legacy CFCs and HCFCs for service work to today's low-GWP A2L refrigerants (R-32, R-454B, R-1234yf) and naturals (R-290 propane, R-717 ammonia, R-744 CO₂) — the refrigerants on your truck are in here. BUILT FOR THE FIELD • Instant refrigerant search • Works completely offline • Clean dark interface, readable in a mechanical room or in full sun • iPhone and iPad • PT data verified against published reference sources Questions, suggestions, or corrections? Email us at: techsupport@cyberprodigy.com — we read and answer every message, and technician feedback drives our updates.

The Digiduct app is a powerful tool designed for HVAC professionals, supporting everything from design calculations to real-time field verification. Built utilizing the equations and recommendations from the ASHRAE Fundamentals – Duct Design chapter, it ensures your calculations are accurate and reliable, saving you time and reducing errors. Key Features: • Multiple Shape Sizing Options: Supports sizing for rectangular, round, and flat oval ducts, offering flexibility for various duct designs. • Customizable Dimensions: For rectangular and oval ducts, users can lock in one dimension, and the app calculates the other, ensuring precise results based on CFM, pressure drop due to friction, or velocity. • Duct Location Intelligence: offers the user predefined parameters to use as starting point and reference when selecting duct sizes so users at HVAC experience level can make confident selections. Why Choose Digiduct? Unlike other duct sizing tools, Digiduct goes above and beyond. It doesn’t just provide basic size outputs—it evaluates the location and context of your duct (high-pressure vs. low-pressure, shaft vs. plenum), alerting you if your selection exceeds maximum pressure drop or velocity limits. This added layer of intelligence ensures higher accuracy and gives users confidence that their sizing is optimal for the application. Get the assurance of precision with Digiduct—designed to meet the demands of real-world HVAC scenarios.