HVAC Calc: Superheat & P/T
Subcooling, Delta-T, Duct, CFM
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Fully offline HVAC field calc: refrigerant P/T, target superheat & subcooling, delta-T, duct sizing, airflow. One-time Pro unlock - no subscription, no ads, no sign-in.
The HVAC technician's calculator that works where you do - on the rooftop, in the mechanical room, in the dead zone.
HVAC Tech is a fast, no-nonsense field calculator for technicians, installers, estimators, and apprentices. Six pro calculators, grounded in published refrigerant data and standard field methods, all running 100% on your phone. No account. No login. No internet. Just answers.
FULLY OFFLINE - ALWAYS
Rooftops, crawlspaces, new construction with no service - HVAC Tech needs zero signal. Every P/T table, every formula, every result is computed on-device. Your data never leaves your phone because there's nothing to send.
SIX PRO CALCULATORS
- Superheat: target (fixed-orifice charging chart or TXV range) vs. actual, with a charge read and the saturation temperature.
- Subcooling: target vs. actual, with a charge read.
- Refrigerant P/T Chart: pressure to saturation temperature, with separate bubble and dew points for glide blends.
- Delta-T: supply/return temperature split vs. a humidity-based target range, with typical-cause guidance.
- Duct Sizing: CFM to round or rectangular duct size and air velocity.
- Airflow & Tonnage: CFM to tons and back (400 CFM/ton, adjustable) plus fan-law RPM changes (CFM, static, and BHP).
FREE FOREVER
All six calculators, unlimited use, on R-410A and R-22 - no trial, no ads, no sign-in. Plus up to three saved jobs.
ONE-TIME PRO. NO SUBSCRIPTION. EVER.
Unlock HVAC Tech Pro once for $9.99 and keep it:
- Every refrigerant: R-454B, R-32, R-134a, R-404A and R-407C - the A2L blends shipping in new equipment and the commercial ones - across superheat, subcooling and the P/T chart.
- Glide-aware readings: separate bubble and dew points on every blend.
- Unlimited saved jobs.
- PDF and share export.
One payment, handled by Apple. No monthly fee, no renewal.
SAVE THE JOB
Tag any reading as a saved job - unit, call, and the numbers - one tap away.
HVAC Tech is an estimation aid and is not a substitute for proper diagnostic procedures. Always verify results against the manufacturer's charging charts and target values.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Thanks for using HVAC Tech! This update:
• Makes HVAC Tech Pro easier to understand — clearer, in-context info on what unlocking adds: every refrigerant (R-454B, R-32 and the commercial blends), unlimited saved jobs, and PDF / share export.
• Fixes a bug where the unlock button could do nothing if the App Store was slow to load. Purchases now retry automatically and report any error.
• Reliability improvements and polish.
The developer, Youssef Kamoun, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Youssef Kamoun
- Size
- 1.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- HVAC Tech Pro $9.99
- Copyright
- © 2026 Youssef Kamoun