# Mine Ventilation Airflow Calc — MSHA Airflow CFM & Pressure

> MSHA Airflow CFM & Pressure (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/mine-ventilation-airflow-calc/id6761699544 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities, Productivity
- Price: $1.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-04-08
- Data updated: 2026-07-19
- User reviews in markdown: https://appshunter.io/ios/app/mine-ventilation-airflow-calc/id6761699544/reviews.md

## What is Mine Ventilation Airflow Calc?

Planning underground ventilation and need to know the required CFM for your crew size, diesel equipment, and airway dimensions? This calculator gives you MSHA-compliant airflow requirements in seconds.

Select mine type (coal, metal/non-metal, or tunnel), enter airway shape and dimensions, and specify personnel and diesel HP underground. Get required airflow, air velocity, and resistance calculations instantly.

WHAT YOU GET:
- Required CFM based on personnel count (MSHA minimums)
- Diesel dilution airflow requirement
- Airway cross-section area for rectangular, arch, or circular openings
- Air velocity at the calculated flow rate
- Airway resistance using Atkinson friction factors
- Fan pressure requirements

MINE TYPES:
Coal (30 CFR 75.325), Metal/Non-Metal (30 CFR 57.8520), and Tunnel — each with correct minimum CFM per person and velocity requirements.

AIRWAY SHAPES:
Rectangular, arch (horseshoe), and circular — with proper area and perimeter calculations for each.

RESISTANCE:
Atkinson friction factor input with typical ranges for smooth (40-60) and rough (80-120) airways.

Works completely offline. No account required. Built for mining engineers, ventilation planners, and safety officers who need fast, MSHA-referenced airflow calculations underground.


## Version history (last 3 releases)

### 1.0.2 — 2026-06-28

Added a More Pro Tools section to discover related field calculators.

### 1.0.1 — 2026-04-13

Bug fixes and performance improvements.

### 1.0 — 2026-04-08

No release notes.

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All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

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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 2026-07-19.*