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Author Question: Why do fiberglass ductboard and flex duct have higher friction loss rates than sheet metal? What ... (Read 99 times)

WhattoUnderstand

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on: Jul 26, 2018
Why do fiberglass ductboard and flex duct have higher friction loss rates than sheet metal?
 
  What will be an ideal response?

Question 2

Why should PVC pipe be cut with a plastic tubing shear instead of a hacksaw?
 
  What will be an ideal response?


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vish98

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Reply #1 on: Jul 26, 2018
Answer to Question 1

Fiberduct and flex duct are not as smooth and even on the inside, so they have higher resistance to airflow.

Answer to Question 2

The shear is preferable because it produces a clean, square cut with no chips, shavings, or burrs.


WhattoUnderstand

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Reply 2 on: Jul 26, 2018
Thanks for the timely response, appreciate it

debra928

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Reply 3 on: Yesterday
Wow, this really help

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