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HVAC/ Mechanical
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How do I find a Contractor? 0 J. Dickinson, Colorado Green Building Guild Please visit our Find a Professional Directory for active Green Building Professionals in Colorado! 
by J. Dickinson, Colorado Green Building Guild
Wednesday, September 12, 2012
Flex Duct? and mold? 1 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
by R. Flax, Boulder County
Wednesday, September 12, 2012
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