Filter Loading
Happens as particulates build up on filter fibers
(filter fibers get fuzzy)
Occurs as the cabinet is used
Creates more surface area for the particle to stick on
Increases filter efficiency
Results in less space between the fibers
Makes it harder to push the same amount of air through
the filter
Requires adjustment to blower-motor speed to maintain air velocity and protection
Time varies depending on particulate levels in surrounding area
Motors / Blowers
Adjustment to the blower-motor keeps the BSC functioning at the correct air velocities
Provide constant volumetric flow rate (cubic feet per minute)
of air
Filter Replacement
Results from particulates accumulating on the HEPA filter fibers creating resistance to air flow through the filter.
Must occur when resistance increases beyond adjustment capability of the motor blower.
