| Conceptual Reference Database for Building Envelope Research |
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| Essay:National Allergy Bureau Outdoor Mold CountsNational Allergy Bureau Outdoor Mold Counts 0 Absent 1-6,499 Low 6,500-12,999 Moderate 13,000-49,999 High > 50,000 Very High Note: numbers are in daily average spore counts per cubic meter Source: American Academy of Allergy and Immunology http://www.aaaai.org/nab/index.cfm?p=reading_charts | ||||||||||