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Glossary

IAQ

Acronym for Indoor Air Quality. EPA's Indoor Air Quality Information Clearinghouse (1-800-438-4318 or 301-585-9020).

IAQA

Indoor Air Quality Association, Inc.

Immunocompromised

When the body's natural defenses to infection are below normal.

Indicator Compounds

Chemical compounds, such as carbon dioxide, whose presence at certain concentrations may be used to estimate certain building conditions (e.g., airflow, presence of sources).

Irritants

Substances which inflame living tissue by chemical action at the site of contact, causing pain or swelling.