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Standard 260-13 | Laboratory Methods of Testing Induced Flow Fans for Rating

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Section/Figure/Table #: 9.2 Total Efficiency Calculation
Due to upcoming changes with the DOE regulating fan efficiency it would be advantageous to put a note in this section as to why we calculate total efficiency differently than AMCA 210

Proposed Change:
Static efficiency is not used to rate this type of fan due to the need for creating a high velocity at the discharge, thus a modified total efficiency calculation is preferable which includes velocity pressure in the formula.

Kenneth Kuntz
Greenheck Fan
Posted: November 11, 2016

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