Glossary

Organic Compounds

Chemicals that contain carbon. Volatile organic compounds vaporize at room temperature and pressure. They are found in many indoor sources, including many common household products and building materials.

Outdoor Air

Air taken from the external atmosphere and, therefore, not previously circulated through the system. 

Outdoor Air Supply

HVAC term for air brought into a building from the outdoors (often through the ventilation system) that has not been previously circulated through the system. Also known as “Make-Up Air”.