# HVAC Formulas Tech Calculator — Reference for technicians > HVAC technician's essential reference for heating, ventilation, and air conditioning formulas. (iPhone/iPad app by Sergio Bost.) - Source: https://appshunter.io/ios/app/hvac-formulas-tech-calculator/id1551053530 (this page in markdown: same URL + `.md`) - Developer: [Sergio Bost](https://appshunter.io/developer/1550113896) - Category: Utilities, Reference - Price: Free - Rating: 3.69/5 from 13 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 1 MB - Languages: English - Released: 2021-02-12 - Data updated: 2026-07-07 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/hvac-formulas-tech-calculator/id1551053530/reviews.md ## What is HVAC Formulas Tech Calculator? HVAC stands for heating, ventilation and air conditioning systems. This system is responsible for heating and cooling and includes products like furnaces, air conditioners, heat pumps as well as ductwork, and thermostats. The most complete reference for HVAC technicians. Our goal is to provide every formula that a technician would use in the field. From air formulas to fan laws we try our best to include every HVAC formula. If it is not present in our app now, we have plans to have it. Find the most commonly used and not so commonly used HVAC formulas here. Some of our current HVAC formulas: -Mixed Air Formula -Latent Heat -Sensible Heat -Enthalpy -Both Fan Laws Save time searching the web. Avoid having to input data manually piece by piece. With an easy UI, you will be able get the answer you're looking with ease. This app is for HVAC technicians because it was made by an HVAC technician. With both fan laws present - rpm, cfm, and inches of water column become easier to work with. When trying to find the mixed temperature of air entering the return coil, one may find himself entering and re-entering data over and over again. That's because the average calculator was not designed for HVAC. Well this was! If you are in the industry of HVAC then more likely you will be dealing with HVAC calculations and formulas. Well, please enjoy the convenience that was designed for you. ## Key features - Comprehensive HVAC formula collection - Formulas for air, fan laws, and heat - Simplified calculations for technicians - Easy-to-use interface - Designed by an HVAC technician - Saves time searching the web ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/hvac-formulas-tech-calculator/id1551053530/reviews.md ### 1/5 — Enter button obscured *2024-06-11* Keyboard stays in the way of clicking “ENTER” button in fan laws. ### 5/5 — Simple, intuitive app for HVAC professionals *2023-02-07* The UI is clean and gets straight to the point. Other apps have a clunky UI and I have to spend time navigating around unnecessarily. This app has easily become part of my daily workflow. ### 1/5 — RipOff *2022-11-09* 6 bucks for this? What a joke . Where is the 3rd fan law? **Developer response:** Hi, I built this as a sole developer in my free time. You bring up a valid point. So let's make this app free. ## Frequently asked questions about HVAC Formulas Tech Calculator ### What HVAC formulas does HVAC Formulas Tech Calculator include? HVAC Formulas Tech Calculator includes common and less common HVAC formulas such as the Mixed Air Formula, Latent Heat, Sensible Heat, Enthalpy, and both Fan Laws. The app aims to provide every formula a technician would use in the field. ### Is HVAC Formulas Tech Calculator free to use? Yes, HVAC Formulas Tech Calculator is available for free. It does not have any in-app purchases or require a subscription. ### Does HVAC Formulas Tech Calculator have ads? No, HVAC Formulas Tech Calculator is ad-free. Users can access all its features without encountering advertisements. ### What devices is HVAC Formulas Tech Calculator compatible with? HVAC Formulas Tech Calculator is available for iPhone and iPod devices. It is designed for iOS users in the utilities category. ### How often is HVAC Formulas Tech Calculator updated? The latest version of HVAC Formulas Tech Calculator is 1.37.13, last updated on May 20, 2021. While the last update was in 2021, the app aims to include all necessary formulas for technicians. ### What is the user rating for HVAC Formulas Tech Calculator? HVAC Formulas Tech Calculator has a rating of 3.7 stars from 13 ratings. This indicates a generally positive but mixed user reception. ### Who developed HVAC Formulas Tech Calculator? HVAC Formulas Tech Calculator was developed by Sergio Bost. The app's description highlights that it was made by an HVAC technician for other technicians. ### What age rating does HVAC Formulas Tech Calculator have? HVAC Formulas Tech Calculator has an age rating of 4+. This means it is suitable for users aged 4 and above. ## Version history (last 5 releases) ### 1.37.13 — 2021-05-20 Simple bug fixes. ### 1.37.12 — 2021-03-09 Simple bug fixes. ### 1.36.21 — 2021-03-07 Simple bug fixes ### 1.36 — 2021-03-01 Added majority of the electrical formulas ### 1.35 — 2021-02-27 Simple bug fixes. ## Apps similar to HVAC Formulas Tech Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Duct Calculator Elite](https://appshunter.io/ios/app/duct-calculator-elite/id665701601) | 4.8 (220) | $6.99 | Utilities | | [Installer App](https://appshunter.io/ios/app/installer-app/id423984641) | 3.0 (7) | Free | Utilities | | [e-Saver Residential](https://appshunter.io/ios/app/e-saver-residential/id427278496) | 4.8 (59) | Free | Utilities | | [AC Calculator - HVAC Sizing](https://appshunter.io/ios/app/ac-calculator-hvac-sizing/id1537174761) | 4.8 (20) | Free | Utilities | | [IN HVAC Calculator](https://appshunter.io/ios/app/in-hvac-calculator/id1219008229) | 4.2 (11) | Free | Utilities | | [Allday HVAC Calc](https://appshunter.io/ios/app/allday-hvac-calc/id6446276144) | 5.0 (1) | Free | Utilities | ## More apps by Sergio Bost - [CoordinateFetcher](https://appshunter.io/ios/app/coordinatefetcher/id1550528420) - [Arabic Companion](https://appshunter.io/ios/app/arabic-companion/id6504136548) All apps by Sergio Bost: https://appshunter.io/developer/1550113896 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-07.*