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Author Question: When comparing duct materials, none have a lower friction rate or are as durable as: A) Sheet ... (Read 187 times)

casperchen82

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on: Jul 24, 2018
When comparing duct materials, none have a lower friction rate or are as durable as:
 
  A) Sheet metal. B) Ductboard. C) Flex duct. D) Fiberboard.

Question 2

What is the recommended face velocity for a return air filter grille?
 
  A) 1,0001,500 ft per minute B) 500600 ft per minute
  C) 300400 ft per minute D) 6001,000 ft per minute


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srodz

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Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

C


casperchen82

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Reply 2 on: Jul 24, 2018
Gracias!

parker125

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Reply 3 on: Yesterday
Excellent

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