Saturday, March 23, 2019

Linx Duct Friction Calculator Excel Sheet

File Size: 552 Kb

1. Instruction

2. Linx Duct Size Calculator
3. Duct Calculator
4. Flat Oval to Round
5. Number of Conduits @ equal velocity
6. Duct Diameter
7. SMACNA 2005 standards for +10 iwg and nominal weight lb/sf

How to use this Excel Sheet :-

  • None of the cells are locked or protected. Keep a backup copy.
  • YELLOW boxes indicate where you can input numerical values as deemed necessary
  • All pressure drops are expressed in inches water gauge per 100 linear feet unless user redefines "Length"
  • Calculations are based upon ASHRAE 1993 Fundamentals, Chapter 32, Duct Design
  • Temperature, barometric pressure, elevation, air density, and conduit roughness coefficients are all user definable .

  1. TAB "Rect to FO & Round" calculates equivalent flat oval and round for a given rectangular duct cross section
  2. TAB "Rect to FO & Round" calculates multiple round conduits based upon "equal friction" and "equal velocity"
  3. TAB "Flat Oval Tables" tabulate Lindab's published standards
  4. TAB "Calculator" is a stand alone calculator for rectangular, flat oval, and round
  5. TAB "Flat Oval to Round" is a stand alone calculator to convert flat oval to equivalent round
  6. TABS "Equal Velocity" and "Equal deltaP" is used to make calculations for "Rectangular to FO & Round"
  7. TAB "Weights" is used to make calculations for "Rectangular to FO & Round"

Download Drive-1

You May Also Like These E-Books:-


  1. Heating and cooling duct cleaning is one of the most important services that you can get for your business. With the right ducts, your heating and cooling system will last longer. Carpet Cleaning Services Melbourne