HVAC Duct Sizer

HVAC Duct Sizer

HVAC duct sizing and more...

8 ratings
39 reviews
$5.99
In-App Purchases

Details

  • Released
  • Updated
  • June 2, 2009
  • February 16, 2026

Features

HVAC Duct Sizer screenshot #1 for iPhone
HVAC Duct Sizer screenshot #2 for iPhone
HVAC Duct Sizer screenshot #3 for iPhone
HVAC Duct Sizer screenshot #4 for iPhone
HVAC Duct Sizer screenshot #5 for iPhone
HVAC Duct Sizer screenshot #6 for iPhone
HVAC Duct Sizer screenshot #7 for iPhone
HVAC Duct Sizer screenshot #8 for iPhone
HVAC Duct Sizer screenshot #9 for iPhone
HVAC Duct Sizer screenshot #10 for iPhone
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About

This app provides quick and simple HVAC duct sizing analysis. It allows users to calculate duct dimensions based on airflow or existing dimensions, and can also determine a range of duct sizes. Results can be emailed for further analysis.

Duct sizing by airflow
Duct sizing by dimensions
Range of duct sizes calculation
Rectangular, round, and oval duct shapes
English and Metric unit options
Email results with CSV attachment
HVAC Equipment Locator
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What's New in HVAC Duct Sizer

7.3

February 16, 2026

1. Fixed crashing issue in Range of Duct Sizes form on iPad version. 2. Updated help.

1

In-App Purchases

$9.99

HVAC Equipment Locator

This in-app purchase allows you to add an unlimited # of customized inputs for buildings, equipment, and maintenance items. It also allows you to add more than 5 photos or 1 document for each building, equipment, and maintenance item.

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User reviews

ความคุ้มค่า

ลองใช้แล้วไม่คุ้มเงิน ตั้งค่าอะไรไม่ได้เลย ยิ่งใช้งานยิ่งงง

Great duct sizer

I’m an HVAC engineer and I use this at work almost every day. It’s a great way to quickly size a run of duct and easily switch between duct types.

A classic

I’ve had this app for 4 or 5 years now, and I can’t believe how use it still is. It’s great that Carmel keeps updating it and now I can use it on my iPad.

high quality accuracy.

Very accurate and useful. Relatively easy to use if you know how to properly size ducts. The only problem with the app is after you enter a value, the screen stops scrolling up and down so you can't see the results. You have to back out to the main menu then re-select the category (i.e. Size by airflow) to see the answer.
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Worked before update

Was a great app but now doesn't show top of screen after entering values.
Sliders are impossible to set accurately too. They always move when your finger is lifted.

Developer apps

FAQ

What does the HVAC Duct Sizer app do?

The HVAC Duct Sizer app is designed to perform quick and simple HVAC duct sizing analysis. It allows users to calculate necessary duct dimensions based on airflow requirements or existing duct dimensions. The app also offers a feature to determine a range of duct sizes within specified friction loss and airflow parameters.

What are the key features of the HVAC Duct Sizer app?

Key features include sizing ducts by airflow or dimensions, calculating a range of duct sizes, supporting rectangular, round, and oval duct shapes, and offering both English (IP) and Metric (SI) units. Users can also email detailed results, including a .CSV attachment for further analysis, and access an HVAC Equipment Locator.

How much does the HVAC Duct Sizer app cost?

The application is available for free with in-app purchases. While the core duct sizing functionality is accessible, additional features or advanced capabilities might be available through in-app purchases.

What devices is the HVAC Duct Sizer app compatible with?

The HVAC Duct Sizer app is a universal application that works on both the Apple iPhone and iPad. It automatically adjusts its screen size to provide an optimal user experience on either device.

Who would benefit from using the HVAC Duct Sizer app?

This app is ideal for HVAC professionals, technicians, and students who need a convenient tool for performing duct sizing calculations on the go. It's useful for sales and service calls, as well as for general HVAC design and analysis tasks.