# SMACNA Duct-U-Lator — Size Simple HVAC Duct Runs

> Digital tool for HVAC professionals to size various duct types for optimal airflow. (iPhone/iPad app by SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC..)

- Source: https://appshunter.io/ios/app/smacna-duct-u-lator/id6702024229 (this page in markdown: same URL + `.md`)
- Developer: [SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC.](https://appshunter.io/developer/427624079)
- Category: Business, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.2 · 3 MB
- Languages: American English
- Released: 2024-10-17
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/smacna-duct-u-lator/id6702024229/reviews.md

## What is SMACNA Duct?

The SMACNA Duct-U-Lator is a digital version of the classic duct sizing tool. It is used by HVAC professionals to quickly size rectangular, round, and oval ducts for optimal air flow in ventilation systems. The app simplifies the calculation process, helping users determine duct dimensions based on variables like air volume (CFM), friction loss, and air velocity.

Key features include:

- **User-friendly Interface**: The app offers a simple, intuitive design that mimics the physical ductulator, allowing for quick inputs and results.
- **Multiple Duct Types**: Supports rectangular, round, and oval duct sizing, giving flexibility in various design scenarios.
- **Real-time Calculations**: As users adjust inputs, the app instantly updates results, speeding up the design process.
- **Enhanced Accuracy**: By automating complex calculations, the app reduces human error and ensures more accurate results compared to manual methods.

This app works as a Duct-U-Lator and Pressure Loss (friction) calculator which has the following functions.

Converts Duct Shape or Size to Another
Determines Sizes for a Given Friction Rate
Determines Sizes for a Given Velocity
Determines Sizes for a Given Velocity and a Friction Loss Rate (simultaneous output)
Determines the Airflow Rate for a Given Size and Friction Loss Rate
Calculates Friction Loss

The SMACNA iOS Duct-U-Lator is a valuable tool for HVAC engineers, contractors, and technicians looking for a portable and efficient way to perform duct sizing on-site. It combines the convenience of modern technology with SMACNA's trusted guidelines for air distribution system design.

## Key features

- Rectangular, round, and oval duct sizing
- Real-time calculation updates
- Converts duct shapes and sizes
- Calculates friction loss
- Determines sizes for given velocity
- User-friendly interface


## Frequently asked questions about SMACNA Duct

### What is SMACNA Duct-U-Lator used for?

SMACNA Duct-U-Lator is a digital tool designed to help HVAC professionals quickly size rectangular, round, and oval ducts for optimal air flow in ventilation systems. It simplifies complex calculations for friction loss and air velocity.

### Does SMACNA Duct-U-Lator support different duct shapes?

Yes, SMACNA Duct-U-Lator supports sizing for rectangular, round, and oval duct types, offering flexibility for various design scenarios in HVAC projects.

### How accurate are the calculations in SMACNA Duct-U-Lator?

The app automates complex calculations, which helps to reduce human error and ensure more accurate results compared to manual duct sizing methods. It follows SMACNA's trusted guidelines.

### Can SMACNA Duct-U-Lator convert duct sizes?

Yes, SMACNA Duct-U-Lator functions as a calculator that can convert duct shapes or sizes to another. It also determines sizes based on friction rate, velocity, or a combination of both.

### What devices is SMACNA Duct-U-Lator available on?

SMACNA Duct-U-Lator is available for iPhone and iPad devices, making it a portable tool for professionals on the go.

### How often is SMACNA Duct-U-Lator updated?

The latest version, 1.94, was released on October 17, 2024. Updates are provided by the developer, SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC., to ensure the app remains current.

### What is the user rating for SMACNA Duct-U-Lator?

SMACNA Duct-U-Lator has a perfect rating of 5.0 stars based on one review, indicating a highly positive user sentiment among its users.

### Does SMACNA Duct-U-Lator have ads?

No, SMACNA Duct-U-Lator does not contain advertisements. It is a free application without any disruptive ads.

## Version history (last 1 release)

### 1.94 — 2024-10-17

No release notes.

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## More apps by SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC.

- [DALC](https://appshunter.io/ios/app/dalc/id427624076)
- [SMACNA HVAC DCS](https://appshunter.io/ios/app/smacna-hvac-dcs/id716751022)
- [SMACNA Event](https://appshunter.io/ios/app/smacna-event/id1643514408)
- [SMACNA Events](https://appshunter.io/ios/app/smacna-events/id6670240458)

All apps by SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC.: https://appshunter.io/developer/427624079

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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 2026-06-04.*