
Digiduct
Duct-Sizing App
About
This HVAC tool assists professionals with duct sizing calculations based on ASHRAE standards. It supports multiple duct shapes and offers intelligent features to ensure accurate and reliable designs for real-world scenarios.
What's New in Digiduct
2.0.0
July 9, 2026
- New Native UI Design - Instant Calculations - Fixed Email export bug - Fixed Round Calc Crash Issue
MoreFAQ
What is Digiduct?
Digiduct is a utility app designed for HVAC professionals to perform accurate duct sizing calculations. It utilizes equations and recommendations from the ASHRAE Fundamentals – Duct Design chapter to ensure reliable results.
What duct shapes does Digiduct support?
Digiduct supports sizing for rectangular, round, and flat oval ducts, providing flexibility for various duct designs.
How does Digiduct ensure calculation accuracy?
The app calculates duct sizes based on CFM, pressure drop due to friction, or velocity. It also evaluates duct location context (high-pressure vs. low-pressure, shaft vs. plenum) and alerts users if selections exceed maximum pressure drop or velocity limits.
What devices is Digiduct available on?
Digiduct is available on iPhone, iPad, and iPod devices.
How often is Digiduct updated?
The latest version of Digiduct is 1.0.6, and it was last updated on August 14, 2025. Updates typically occur to improve functionality and reliability.
What is the age rating for Digiduct?
Digiduct has an age rating of 4+, making it suitable for a wide range of users.
Does Digiduct have ads?
Yes, Digiduct contains advertisements.
What is the user sentiment for Digiduct?
Digiduct has received excellent user feedback, holding a rating of 5.0 stars from 10 ratings.




