The integrity of fan data
Where comparisons of fan efficiency are to be made, it is essential that all data is the result of tests. These should be conducted to the same standard and test method. Individual witnessed tests are usually only possible after manufacture is complete and are very expensive. The purchaser should seriously consider if certified ratings in accordance with schemes such as AMCA211 will give the desired assurance (see Chapter 17, Section 17.11.2).
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