# HVAC Duct Size Calculator

> HVAC duct sizing calculator for design professionals. (iPhone/iPad app by Alan Cave.)

- Source: https://appshunter.io/ios/app/hvac-duct-size-calculator/id485800827 (this page in markdown: same URL + `.md`)
- Developer: [Alan Cave](https://appshunter.io/developer/474647608)
- Category: Utilities, Productivity
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings · 19 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.1 · 30 MB
- Languages: American English
- Released: 2011-12-08
- Data updated: 2026-08-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hvac-duct-size-calculator/id485800827/reviews.md

## What is HVAC Duct Size Calculator?

This duct sizing app was created for HVAC design professionals who might normally use a "ductulator" to select an duct sizes.

The app goes beyond simply calculating velocity, friction, or volume; It also offers a list of every even sized duct that meet the design criteria for the user to review and consideration at various aspect ratios.

The app features a highly intuitive interface which allows the user to easily adjust values with precision (without the use of cumbersome "slider" controls), or alternatively to enter the values directly with a keypad interface.

Feel free to email comments and suggestions to ductapp@elecpe.com

## Key features

- Duct size calculation
- Velocity, friction, and volume calculations
- List of even-sized ducts
- Intuitive interface
- Precise value adjustment
- Keypad input

## Recent user reviews (10 of 19)

All indexed reviews: https://appshunter.io/ios/app/hvac-duct-size-calculator/id485800827/reviews.md

### 5/5 — Every Day Duct Sizing Tool

*2024-09-25*

I use this every day all day, no other duct calculator app compares to the simplicity and accuracy of this app.  I hope this never goes away…

### 1/5 — Please don’t waste your money

*2020-01-04*

Simply Rubbish 
I don’t know why apple let them sale this kind of apps in App Store

### 1/5 — Doesn’t Work On My iPhone 7

*2018-10-05*

For some reason the app doesn’t show all of it’s functions that are advertised. Pretty much useless on my iPhone 7

### 1/5 — Horrible app

*2016-06-28*

Do a favor to your self don't buy this app is just a waste of your time.

### 1/5 — Absolute ripoff

*2015-07-13*

Doesn't do anything. A useless toy

### 1/5 — Not worth the storage

*2015-06-12*

This app is so basic and so simple it is not worth taking up any storage on your device. Let alone actually paying for it.

### 1/5 — Tech

*2015-04-16*

Junk

### 1/5 — Junk

*2015-04-02*

Not what you think stick to the cardboard version you always used its way off     I give it half star

### 1/5 — Very Basic

*2014-09-25*

Doesn't allow you to enter a rectangular duct size, it does provide various sizes based on input criteria but that's not much help if you are working with already installed duct.

### 1/5 — Useless

*2014-03-29*

This app is another fail for the hvac apps

## Frequently asked questions about HVAC Duct Size Calculator

### What is HVAC Duct Size Calculator?

HVAC Duct Size Calculator is a utility app designed for HVAC professionals to calculate appropriate duct sizes. It provides detailed calculations for velocity, friction, and volume, along with a list of suitable duct options.

### Who is HVAC Duct Size Calculator for?

This app is specifically for HVAC design professionals who require a digital tool to assist with duct sizing calculations, similar to using a physical ductulator.

### How does HVAC Duct Size Calculator calculate duct sizes?

The app calculates duct sizes based on design criteria, going beyond simple velocity, friction, or volume. It presents users with a list of even-sized ducts that meet these criteria for review.

### What devices does HVAC Duct Size Calculator support?

HVAC Duct Size Calculator is available for iPhone, iPad, and iPod devices.

### How much does HVAC Duct Size Calculator cost?

HVAC Duct Size Calculator is a paid app, priced at $0.99. There are no in-app purchases or subscriptions.

### Is HVAC Duct Size Calculator ad-free?

Yes, HVAC Duct Size Calculator is ad-free. It does not contain advertisements.

### When was HVAC Duct Size Calculator last updated?

The latest version of HVAC Duct Size Calculator was updated on August 28, 2017. The app was originally released on December 8, 2011.

### What is the age rating for HVAC Duct Size Calculator?

HVAC Duct Size Calculator has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 4 releases)

### 1.3 — 2017-08-28

This app has been updated by Apple to display the Apple Watch app icon.

updated for 64 bit compatibility

### 1.2 — 2014-08-12

added iPad support

### 1.1 — 2012-03-24

Added aspect ratio for each duct size.

### 1.0 — 2011-12-08

No release notes.

## Apps similar to HVAC Duct Size Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Duct Calculator Elite](https://appshunter.io/ios/app/duct-calculator-elite/id665701601) | 4.8 (231) | $9.99 | Utilities |
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## More apps by Alan Cave

- [A NEC® Quick Reference](https://appshunter.io/ios/app/a-nec-quick-reference/id474647605)
- [Alchemy for Skyrim ®](https://appshunter.io/ios/app/alchemy-for-skyrim/id484305110)
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- [Spells in Skyrim ®](https://appshunter.io/ios/app/spells-in-skyrim/id536405940)
- [Perks in Skyrim ®](https://appshunter.io/ios/app/perks-in-skyrim/id560809502)

All apps by Alan Cave: https://appshunter.io/developer/474647608

## Related topics

[quietflex ductulator](https://appshunter.io/ios/topics/quietflex-ductulator) · [thermaflex duct calculator](https://appshunter.io/ios/topics/thermaflex-duct-calculator) · [duct design](https://appshunter.io/ios/topics/duct-design)

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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 2026-08-15.*