Reply by crank49

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Posted on Anyone try upgrading their HF DC impeller?

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4032 posts in 2993 days

#1 posted 04-10-2013 03:12 PM

Some fans are designed with forward inclined vanes and some are straight or backward inclined. Can’t say they are made incorrectly unless you know what the original design was. The angle has a great deal to do with the volume v.s. pressure curves and also the capacity to run in different temperatures without overloading.

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