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Hey Ed, What is Friction Rate?


In this edition of "Hey Ed", Ed discusses friction rate.

Hey Ed, what is Friction rate? Connor, that's an excellent question. Friction rate is a measurement of pressure drop and if we're gonna talk specifically at a manual D it's pressure drop per 100 feet and in my opinion, it is the number that is made up far too frequently in our industry and if I can ask a big favor of everybody that has anything to do with duct design, stop making up friction rate and actually calculate it, will be a better industry for it and that's the way I see it.

In this edition of “Hey Ed”, Ed discusses friction rate.

Ed Janowiak
Latest posts by Ed Janowiak (see all)

Ed Janowiak is the Manager of HVAC Design Education at ACCA.


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Posted In: Hey Ed, Manual D, Technical Tips

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