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Glossary of Mold Related Terms

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Natural Ventilation

The movement of outdoor air into a space through intentionally provided openings, such as windows and doors, or through nonpowered ventilators or by infiltration.

Negative Pressure

Condition that exists when less air is supplied to a space than is exhausted from the space, so that the air pressure within that space is less than in surrounding areas.

NIOSH

National Institute for Occupational Safety and Health.

Nitrogen Oxides (NOX)

Nitrogen compounds such as NO and NO2 produced by combustion. They help to from ozone and photochemical smog.

NO2

Nitrogen Dioxide