Manual TT-102 - Understanding the Friction Chart

Manual TT-102 - Understanding the Friction Chart

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Description

Confusing the pressure drop with friction rate can lead to significant errors. TT-102 shows you how to read friction charts used with the Duct Calculation Slide Rule.

 

Topics include:

 

  • How to read the friction chart given any two of the four parameters (CFM, friction rate, velocity, and duct size)
  • The difference between friction rate and pressure drop
  • How to convert pressure drop data into friction rate values
  • How to use friction rate values, velocity limits, and CFM requirements to determine duct sizes
  • : Air Conditioning Contractors of America (ACCA)