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ACCA Duct Calculation Slide Rule

Product Code/ISBN: 9781892765147

This durable two-sided plastic sizing wheel comes with a complete instruction manual for residential and commercial duct-sizing procedures. Designed by Hank Rutkowski.


  • Sizes metal ducts, lined metal ducts duct board airways, and wire helix flexible ducts
  • Converts round shapes to equivalent rectangles
  • Correlates available pressure with total effective length and friction rate (Manual D sizing calcula­tions)
  • Converts velocity into velocity pressure and vice versa
  • Corrects for altitude and temperature