H-E-P Vane Estimating Chart

New! Easy Contractor Takeoff/Estimating Spreadsheet - download here  (Excel 2003 or later)  Note: When done, save Excel spreadsheet, then email to Aero Dyne

Manual Method:

To estimate the amount of side rail material required, multiply the duct width in inches times 0.236. The result is the number of feet needed for both top and bottom pieces across the diagonal.

Figures shown on chart below represent the number of feet of turning vanes required for a square elbow of given dimensions.
FOR EXAMPLE: A square elbow in a duct 48 wide x 36 high requires 84 lineal feet of vanes. A duct 36 wide x 48 high requires approximately the same number of feet. Therefore, read the largest dimension in the left hand column, and the small across the top. If a duct is larger than 60 inches, divide into sections and add the number of feet obtained from the table for each section. Add for anticipated waste in cutting, if any.

EXAMPLE CALCULATION: Find the number of feet of side rails required for 25 elbows 36 wide x 24 high (vane length)
USE FORMULA: Duct width x 0.236 x no. of elbows
ANSWER: 36 x 0.236 x 25 = 213 feet VANES Per foot = .663 lbs. SIDES: Per foot = .385 lbs.