Quote:
Originally Posted by billybek
What does the forward curve fan look like?
Are the blades of the fan coated or filled with dust?
As mentioned check your returns and supplies and maybe have a the ducting changed out. Flex is nasty stuff for resistance to flow when it is installed well. Yours is not installed well.
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You can't really see the fan very clearly, but one can see about 10% of the edge of the blades and they are very clean. Sticking my hand in there (power off) I can't feel any dust on the blades. That indeed was one of the first things I checked...
-Wayne