Duct Flow Calculators

MAS DuctFlow Calculators

A big part of any HVAC project is calculating duct flows, pressure losses, converting duct flow volumes etc. In order to help you we have devised our own mini calculation “apps” feel free to use them as much as you want, if you need any advise don’t hesitate to contact our technical gurus at MAS.

  • Volume Unit Converter
  • A simple volume unit converter to convert air flow volumes from one unit to another.
  • Equivalent Size Calculator
  • Our Equivalent size calculator takes out the pain of working out equivalent sizes of ductwork.Example you have rectangular duct that is 300mm(w) x 200m(h) and you want to know the equivalent size in circular spiral duct, simply type the data in the relevant box and hey presto! the answer appears in the green box (276 mm Dia incase you were wondering).You can find the equivalent size for rectangular duct to circular duct, circular duct to square duct, even rectangular to square. Once you know what you need, head on over to our shop to buy your ducting and HVAC materials on-line.
  • Pipe Diameter Calculator 
  • Our Pipe Diameter Calculator helps you work out the correct pipe diameter depending on the volume or velocity of air.
  • System Pressure Calculator
  • The System Pressure Calculator helps you work out the resistance (in pascals) that elements (spiral tube, fittings, duct heaters etc) place on a ventilation duct run.