Biological Contaminants

Biological Contaminants: Bacteria, fungi (mold and
mildew), spores, viruses, animal dander, mites, insects,
pollen, and the by-products of these elements.
Cleaning: The removal of visible particulate and
biologicals to a level defined within this document.
Closure: (1) An access door or panel installed on the air
duct or air-handling unit to create a permanent seal. (2)
Device or material used in closing a service opening.
Closure Panel: Sheet metal, or other appropriate
material used for permanently closing a service opening.
Coatings: See “Surface Treatments.”
Coils: Devices inside an HVAC system that temper
and/or dehumidify the air handled by the HVAC system.
These include heat exchangers with or without extended
surfaces through which water, ethylene glycol solution,
brine, volatile refrigerant, or steam is circulated for the
purpose of total cooling (sensible cooling plus latent
cooling) or sensible heating of a forced-circulation air
stream (See ASHRAE 33-78 and ARI 410-91).