Printable Duct Sizing Chart
This one-page worksheet is for HVAC installers, designers, and homeowners who need to size ducts by room airflow. It includes columns for Room, CFM, Friction rate, Exact diameter in, and Velocity fpm at the next whole-inch size. Example rows include Bedroom 1, Bedroom 2, and Living room with sample CFM and friction rate entries.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 48 KB
Free for personal, family and classroom use.
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Enter each room’s CFM and friction rate, then use the sheet to read the exact round duct size and the velocity for the next larger whole-inch size. Fill it out room by room during design, take it to the jobsite for quick checks, or use it to compare duct sizes before cutting or ordering materials.
Good for
- Size ducts room by room
- Check airflow before installation
- Compare exact size and velocity
Tip: Print it at full size so the columns stay easy to read when filling in multiple rooms.
4 files · XLSX, PDF, DOCX
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This sheet plus 3 more in one download, with the editable Excel and Word files. Excel room-by-room duct sizing workbook, a printable duct schedule, a trunk reduction worksheet and a duct installation checklist.
$3.00 USD, one-time 4 files · about $0.75 each
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