1) Submitted by
Jim Zolbe, from Lincoln, NE
For best airflow, consider using two 45 degree elbows in place of this 90. I guess molding plastic in the shape of a bent tube is difficult, because this elbow has an obstruction inside instead of a smooth curve. Imagine a corner formed by two straight tubes mitered on the ends and joined like a picture frame: the inside corner is square. That's the contour inside this elbow. Since the outside is round as you'd expect, the square inside corner constricts airflow.
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- 04/20/2012 See more...