# VentCalc Pro — HVAC Ventilation Calculator

> HVAC Ventilation Calculator (iPhone/iPad app by Guanghe Xu (tianjin) Digital Technology Co., Ltd.)

- Source: https://appshunter.io/ios/app/ventcalc-pro/id6763485742 (this page in markdown: same URL + `.md`)
- Developer: [Guanghe Xu (tianjin) Digital Technology Co., Ltd](https://appshunter.io/developer/1895336115)
- Category: Utilities
- Price: $1.99
- Age rating: 4+
- Requires: iOS 16.0 · 2 MB
- Languages: American English
- Released: 2026-04-28
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/ventcalc-pro/id6763485742/reviews.md

## What is VentCalc Pro?

VentCalc Pro is a professional HVAC and ventilation engineering calculator for mechanical engineers, building designers, and HVAC technicians. Accurately size ductwork, calculate airflow, and analyze ventilation systems with ease.

KEY FEATURES:
• Duct sizing (round & rectangular)
• Airflow & velocity calculator
• Pressure drop in duct systems
• Fan power & efficiency
• Air changes per hour (ACH)
• Psychrometric calculations
• Outdoor air requirement (ASHRAE 62.1)

Perfect for HVAC designers, mechanical engineers, building officials, and engineering students. All calculations are performed locally — no internet connection required.


## Version history (last 1 release)

### 1.0 — 2026-04-28

No release notes.

## More apps by Guanghe Xu (tianjin) Digital Technology Co., Ltd

- [WeldSpec Pro](https://appshunter.io/ios/app/weldspec-pro/id6763484882)
- [HydraCalc Pro](https://appshunter.io/ios/app/hydracalc-pro/id6763485334)
- [GearDrive Pro](https://appshunter.io/ios/app/geardrive-pro/id6763485586)
- [AgriFlow Pro](https://appshunter.io/ios/app/agriflow-pro/id6763485593)
- [RopeRig Pro](https://appshunter.io/ios/app/roperig-pro/id6763485855)

All apps by Guanghe Xu (tianjin) Digital Technology Co., Ltd: https://appshunter.io/developer/1895336115

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*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 2026-05-17.*