3
•
The first-stage 1"-deep, coarse particulate pre-filter (F621) is designed to capture particles
100 microns or larger.
•
The second-stage 2"-deep, pleated pre-filter (H502) is designed to capture particles 10
microns or larger.
•
Each HEPA filter (H610C-99) is tested & certified to capture at least 99.97% (9,997 out of
10,000) 0.3-micron particles.
Note: The particulate filters in the PAS1200 do
not
remove odors, vapors or gases, including volatile
organic compounds.
Optional Vapor-Lock Carbon Filters (must be purchased separately)
Vapor-Lock
®
pleated, high-capacity, carbon filters (part # VL1002) are available for capturing OVG.
This 2"-deep filter can be used as a third-stage pre-filter, to reduce airborne OVG by chemically
bonding the OVG molecules to the surface area of the carbon granules, via a process known as
adsorption. The VL1002 filter also provides a similar level of particulate filtration efficiency to the
H502 pre-filter.
Effective carbon adsorption is dependent upon the amount of carbon & exposed carbon granule
surfaces, and the dwell (contact) time the OVG molecules have with the carbon granules.
Operating the unit at lower speed settings to increase dwell time can therefore improve OVG
adsorption, though it is highly unlikely that all of the OVG will be removed in one pass of air through
the unit. Operating the unit in the recirculation mode can increase effectiveness, by exposing OVG
particles to multiple passes through the Vapor-Lock filter.
It is almost impossible to provide accurate estimates to two commonly asked questions: “how
much time will it take to capture all of the OVG?”, and “how do I know when a carbon filter should be
replaced?” Unfortunately, unknown factors, such as concentration levels, fresh-air intake volume,
temperature, and humidity prevent establishment of any more accurate ‘rule of thumb’ than one’s
sense of smell. Since off-gassing of adsorbed OVG can occur when the adsorption capacity of the
filter is reached, replace the carbon filter as soon as odor breakthrough is sensed. More detailed
information on carbon adsorption can be found in an article titled:
“Activated Carbon: How Is It
Used? How Does It Work?”
which can be found on the Links and Articles page of the Mold
Abatement, Restoration & Renovation products section of the Abatement Technologies website,
www.abatement.com
.
TO DETERMINE THE REQUIRED NUMBER OF PORTABLE AIR SCRUBBERS
Note: The Mold Abatement, Restoration & Renovation section of the Abatement Technologies
website,
www.abatement.com
, includes a handy Air Change Calculator for all PAS models. This
calculator provides users with a simple way to determine how many units are needed to provide a
given number of air changes per hour (ACH) in any size containment area, and eliminates the need
for user calculations. Simply enter the dimensions of the containment area, the ACH required, and
select a built-in safety factor (SF) , to compensate for potential losses due to filter loading, inlet and
exhaust collars, ducting, etc. (Please note that use of a SF is recommended, but not required). The
calculator does the rest.
To determine the number of units required without using the Air Change Calculator, proceed as
follows:
1. Calculate the volume inside containment (V), in cubic feet, by multiplying the length of the
area (L) x the width of the area (W) x the ceiling height (H), in feet.
2. Determine the minimum ACH required in the job specification.
