# Ductalator — HVAC Duct Sizing Calculator

> HVAC Duct Sizing Calculator (iPhone/iPad app by David Mepham.)

- Source: https://appshunter.io/ios/app/ductalator/id6747029541 (this page in markdown: same URL + `.md`)
- Developer: [David Mepham](https://appshunter.io/developer/1819462295)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 10 MB
- Languages: American English
- Released: 2025-07-25
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/ductalator/id6747029541/reviews.md

## What is Ductalator?

Have you ever used the quintessential Trane Ductulator for your HVAC duct size calculations. Well here is a super easy to use Ductalator App that simplifies duct sizing calculations with the spin of a wheel. Simply enter two of the four parameters (Flow rate, Pressure drop, Velocity of Duct size) and the other values are calculated automatically for you. If you are involved in designing HVAC systems from small toilet exhaust through to multi-roomed variable air volume systems, this is the app for you. Download it and give it a free try. 

"Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/"
"Privacy Policy: http://www.azitechgames.com/ductalator.html"

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Annual Subscription | $6.99 | per year |
| Monthly Subscription | $1.99 | per month |



## Version history (last 3 releases)

### 1.0.6 — 2025-08-14

Added ability to change the screen colour scheme

### 1.0.5 — 2025-07-29

Minoir bugs corrected

### 1.0.4 — 2025-07-25

No release notes.

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## Related topics

[ductalator](https://appshunter.io/ios/topics/ductalator) · [ductulator](https://appshunter.io/ios/topics/ductulator) · [ductulator duct sizing](https://appshunter.io/ios/topics/ductulator-duct-sizing) · [free ductulator](https://appshunter.io/ios/topics/free-ductulator)

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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 2026-05-15.*