|
CONFINED SPACE
Large enough area to be occupied by an individual, but with limited or restricted means for entry or exit; not normally designed for continuous occupancy.
CFM
Cubic feet per minute—measurement of flow handled by a fan.
STATIC PRESSURE
Usually expressed in inches water gauge (Wg); pressure measured in a direction normal to the air flow; static pressure combined with velocity pressure equals total pressure.
BLOCKED TIGHT STATIC PRESSURE
Operating condition in which the fan outlet is completely closed, resulting in no air flow.
FREE AIR DELIVERY
Maximum airflow where static pressure across the fan is zero.
CAPTURE VELOCITY
Air velocity at any point in front of the hood opening necessary to overcome opposing air currents and to capture the contaminated air at that point.
DECIBEL LEVELS
Sound data on COPPUS products are based on tests conducted with units operating at published speeds. No attachments for attenuating sound were used [dBA levels recorded at 5’ (1.5 m)].
|
