I have a 191,000 sf nc school that will require 11 sample points. When performing a preliminary screening test using a PID, it was found that the inside TVOC levels were 40% less than outdoor level. However, the inside levels were still more than 10x the LEED limit. We have had very hot and humid weather and the building is surrounded by new hot top, it is mid August and the natural vegetation beginning to die off producing bio-effluents, etc.
Filters with an appropriate merv rating will reduce particulate levels but not vocs. Is there a varience in the standard to allow indoor/outdoor comparisons to deal with this?
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
August 13, 2012 - 11:59 am
Mark,
I haven't heard of a variance for your situation, but you may want to inquire for a LEED Interpretation. You might also consider going for this credit by the flush out method (although the humid OA might also be an issue).
One way to reduce VOCs by filtration is to use a Carbon filter.