Duct Size Chart PDF Free Download | HVAC Duct Dimensions Guide
Whether you’re designing a full HVAC system or just reviewing ductwork submittals, a duct size chart is a must-have reference. This downloadable Duct Size Chart PDF provides quick access to standard duct dimensions for rectangular and round ducts — including airflow values, velocity ranges, and aspect ratios.
It’s perfect for MEP draftsmen, HVAC engineers, and site supervisors who need fast, accurate information in the field or office.
What’s Inside the PDF?
- Standard Rectangular Duct Sizes
- Equivalent Round Duct Dimensions
- Recommended Air Velocity (fpm/m/s)
- CFM vs. Duct Size lookup tables
- Conversion references (mm/inches)
- Color-coded layout for better readability
This chart is based on SMACNA and ASHRAE guidelines.
Who Should Use This?
- HVAC Designers & Draftsmen
- Mechanical Engineers & Consultants
- Contractors & Site Supervisors
- Engineering Students
Why Use a Duct Size Chart?
- Save time during design and coordination
- Quickly check compatible sizes for airflow needs
- Standardized references for submittals
- Avoid over/under-sizing of ductwork
Related Resource
Need to calculate duct size live instead of a static chart?
👉 McQuay Duct Sizer Free Download
Download Duct Size Chart PDF
Click below to download the PDF chart. The link will appear after a short wait:
Final Thoughts
This Duct Size Chart PDF makes ductwork design easier and faster — especially during BOQ takeoffs, site inspections, or quick revisions. Keep it printed or saved on your device for instant reference.
Visit MEPBase.com for more MEP resources, tools, and drafting support.