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Flex Duct? and mold?
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9/12/2012 at 6:00:34 AM GMT
Posts: 33
Flex Duct? and mold?

Is flex duct more likely to harbor mold and allergens? How long does flex-duct last? Is sheet metal worth the extra cost?

9/12/2012 at 10:26:06 PM GMT
Flex duct tend to have more turbulence because the interior is not as smooth as hard pipe.  This leads to more fan energy needed per volume of air moved.  I have not heard of a significant difference with regards to molds and allergens, but it is more difficult to clean and therefore more likely to provide "habitat".  Properly installed, I do not know of that there is much of a difference with regards to service life - but there is probably some difference as the material is more vulnerable to physical damage.  - Ron Flax

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