# Duct Construction — Gauge & Reinforcements

> Duct construction and reinforcement calculator based on size and pressure class. (iPhone/iPad app by Wassim Murr.)

- Source: https://appshunter.io/ios/app/duct-construction/id6443518338 (this page in markdown: same URL + `.md`)
- Developer: [Wassim Murr](https://appshunter.io/developer/1474939474)
- Category: Productivity, Reference
- Price: $0.99 (on sale, was $2.99)
- Rating: 1.00/5 from 1 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 1 MB
- Languages: American English
- Released: 2022-09-27
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/duct-construction/id6443518338/reviews.md

## What is Duct Construction?

Get all duct construction and reinforcement options by entering the duct size and system pressure class.

The aim of the app is to save time spent browsing through tables and texts to determine suitable options, by relying on the most widely used standards and providing a condensed list of available duct construction options.

The results are based on galvanized steel duct sheets conforming to ASTM A653 & A924.
The app does not cover all aspects of duct construction, as it is intended as a guide; Reliance on related standards, as well as good engineering sense is the basis for proper design.

Features:
1. Duct sizes from 2" to 120"
2. Pressure classes 0.5 in.wg, 1 in.wg, 2 in.wg, 3 in.wg and 4 in.wg.
3. Provides the duct weights for each option per linear foot.
4. Provides required duct gauge and reinforcement spacing.
5. Clear illustration for each reinforcement type, as well as dimensions.
6. Simple and effective UI design.

Roadmap / Upcoming updates:
1. SI units.
2. More pressure class options.
3. User will be able to save and retreive duct data for future reference.
3. More Reinforcement options, including tie-rodding.

Request a feature: welmurr@icloud.com

## Key features

- Duct size range from 2" to 120"
- Pressure classes up to 4 in.wg
- Calculates duct weights per linear foot
- Determines required duct gauge and reinforcement spacing
- Clear illustrations for reinforcement types
- Simple and effective UI design

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/duct-construction/id6443518338/reviews.md

### 1/5 — This is a worthless app.

*2026-07-08*

Total waste or money

### 1/5 — What did I just purchase

*2025-01-17*

It’s an app that asks you what kind of duct for what pressure rating you want, and then it just tells you back what you just told it.

**Developer response:** Hi, thank you for your feedback. Once you input the duct size and pressure rating, the app will list the acceptable duct construction and reinforcement options. Start by checking your input, and if the problem persists, let us know at welmurr@icloud.com

### 1/5 — Duct

*2024-12-08*

About the most useless app for the hvac industry

## Frequently asked questions about Duct Construction

### What duct sizes does Duct Construction support?

Duct Construction supports duct sizes ranging from 2 inches to 120 inches. This wide range allows for calculations across various project scales.

### What pressure classes can I calculate with Duct Construction?

You can calculate for pressure classes including 0.5 in.wg, 1 in.wg, 2 in.wg, 3 in.wg, and 4 in.wg. This covers common system pressure requirements.

### Does Duct Construction provide information on duct weight?

Yes, the app provides the duct weights for each calculated option per linear foot. This is useful for material estimation and structural considerations.

### What kind of reinforcement details does Duct Construction offer?

Duct Construction provides the required duct gauge and reinforcement spacing for each design. It also includes clear illustrations for each reinforcement type and its dimensions.

### Is Duct Construction available on Android devices?

Based on the provided information, Duct Construction is currently supported on iPhone and iPad. An Android version is not specified.

### How often is Duct Construction updated?

The app was last updated on December 22, 2025, with version 1.3.1. Upcoming updates are planned to include SI units, more pressure class options, and user data saving features.

### What is the price of Duct Construction?

Duct Construction is a paid application priced at $2.99. This one-time purchase grants access to its duct calculation features.

### Does Duct Construction have ads?

No, Duct Construction does not contain advertisements. As a paid app, it offers an ad-free experience for its users.

## Version history (last 5 releases)

### 1.3.1 — 2025-12-22

We are always working on various improvements and new features.

### 1.3 — 2025-01-29

- Added pressure class 3 in.wg and 4 in.wg
- Improved UI layout for iPad.
- Share reinforcement results.

### 1.2 — 2024-04-15

- Added pressure class 3 in.wg and 4 in.wg
- Improved UI layout for iPad.
- Share reinforcement results.

### 1.1 — 2022-10-03

* Minor animation bug fix

### 1.0 — 2022-09-27

No release notes.

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## More apps by Wassim Murr

- [Ductulator - Duct Sizing](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475)
- [Pipe Sizer - Water Pipe Sizing](https://appshunter.io/ios/app/pipe-sizer-water-pipe-sizing/id1576656624)
- [Word Jar - Vocabulary](https://appshunter.io/ios/app/word-jar-vocabulary/id6444877815)
- [Psychrometrics](https://appshunter.io/ios/app/psychrometrics/id6455889577)
- [Flip - Flash cards](https://appshunter.io/ios/app/flip-flash-cards/id6744840810)

All apps by Wassim Murr: https://appshunter.io/developer/1474939474

## Related topics

[spiralite duct sizer](https://appshunter.io/ios/topics/spiralite-duct-sizer)

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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 2026-08-26.*