Ductulator - HVAC Duct Sizing

1.5

welmurr

4.35

296 reviews

5,000+
Downloads

$2.99

Duct Size Calculator for HVAC Design Engineers

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About Ductulator - HVAC Duct Sizing

Ductulator - HVAC Duct Sizing is a productivity app developed by welmurr.

Download Statistics

Ductulator - HVAC Duct Sizing has been downloaded 6.4 thousand times. In the last 30 days, the app was downloaded 210 times. It is ranked in the top 100 productivity apps.

User Ratings

Ductulator - HVAC Duct Sizing is rated 4.35 out of 5 stars. The rating is based on 300 ratings.

App Information

Ductulator - HVAC Duct Sizing costs $2.99 to download. The APK download size is 1.57 MB. The latest version available is 1.5. The last update was on May 13, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play October 2022.

Description

The Duct Sizer App designed based on surveying the needs of engineers.
Units can be changed from Imperial to S.I

This is a much faster and versatile equivalent of the duct sizing charts provided by top HVAC manufacturers.

In Design Mode: Get a range of suitable duct sizes by inputting either the maximum friction rate or maximum velocity. The App will provide a list of suitable rectangular and circular ducts as well as resulting friction rates and velocities

In Sizing Mode: Just like a Ductulator, Adjust the duct dimensions and air flow rates, while checking the resulting friction rate and velocity which update automatically. The Sizing mode is typically used to analyze existing duct systems, and was added upon the request of users' feedback.

Calculations are based on standard air 0.075 lb/ft3 (1.2 kg/m3) in clean galvanized steel duct.

Any feedback is welcome, and will be the basis for future updates.

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More data about Ductulator - HVAC Duct Sizing

Price	$2.99
Total downloads	6.4 thousand
Recent downloads	210
Rating	4.35 based on 300 ratings
Ranking	Top ranked
Version	1.5
APK size	1.57 MB
Number of libraries	?
Suitable for	Everyone
Ads	NO ads

App Performance Report

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Alternative downloads for the Ductulator - HVAC Duct Sizing app

Ductulator - HVAC Duct Sizing compared with similar apps

Common keywords of similar apps

Mode Ductulator Design Engineers Based Suitable Rate Resulting Rates Feedback Duct Sizing Hvac Friction App Maximum Velocity Air

Keywords missing from this app

Calculator Size Calculations Calculate Test Bend Pressure Pipe Equipment Layout Recent Application Users Drop Angle Cable Engineering Practice Industry Flow Diameter Sheet Metal Electrical Exam Designed Rectangular Units Time Offset Functions Inspector Interface Added Input Number Ductwork Features Easily Round Length Home

Google Play Rating history and histogram

Downloads over time

Ductulator - HVAC Duct Sizing has been downloaded 6.4 thousand times. Over the past 30 days, it has been downloaded 210 times.

Changelog of Ductulator - HVAC Duct Sizing

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Developer information for welmurr

welmurr

welmurr@gmail.com

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Comments on Ductulator - HVAC Duct Sizing for Android

★★★★★ Richard G Wallen · Apr 17, 2026

Better than my Trane ductulator - I used this for a year on the iPhone. I've since traded that in for a Samsung so bought it again. The features are a little different. One thing I miss is to be able to "size" vs design by switching from flex to rectangular or square duct. I use this to cross-check my Manual D where I can see the friction loss across distribution boxes and triangles. Are you considering a PC version?

★★★★☆ Vaibhav Savani · Oct 18, 2024

Useful App for Immediate tentative Duct sizing on sites.

★★☆☆☆ ENGIN333R · May 13, 2023

Disappointed, I was expecting it to be more flexible with the Units, but I was stuck with m3/hr, an I need to use L/s, so if I'm going to use this app I would have to do so many units conversion for a ducting design of a building.

★☆☆☆☆ Kerry Nardi · Jul 25, 2024

Completely unnecessary. A shame that we value using our brains so little that we wish to open source a skilled trade that requires training and field experience to understand. Every certified trade can do the math in their head. Useless.

★☆☆☆☆ Aaron Wicklund · Nov 16, 2025

If you can't use the full functions of an actual ductulator what is the point? I want my money back!!!!!

Google Play Rankings for Ductulator - HVAC Duct Sizing

Top rankings

Rank	Country	Category	List
19	United States	Productivity	Top Paid
66	India	Productivity	Top Paid
67	Denmark	Productivity	Top Paid
67	Finland	Productivity	Top Paid
67	Mexico	Productivity	Top Paid
67	Netherlands	Productivity	Top Paid
67	Norway	Productivity	Top Paid
67	Poland	Productivity	Top Paid
69	Austria	Productivity	Top Paid
69	Switzerland	Productivity	Top Paid

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Ranking history in United States

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