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Nominal Size Nominal Pressure Drop Approx. Media
WxHxD (inches) Capacity (CFM) 90-95% 80-85% 60-65% Area (Sq. Ft.)
12x24x4 1000 .75 .70 .55 58
16x20x4 1111 .75 .70 .55 64
16x25x4 1389 .75 .70 .55 80
18x24x4 1500 .75 .70 .55 86
20x20x4 1388 .75 .70 .55 80
20x24x4 1666 .75 .70 .55 96
20x25x4 1736 .75 .70 .55 100
24x24x4 2000 .75 .70 .55 115
Nominal Size Nominal Pressure Drop Approx. Media
WxHxD (inches) Capacity (CFM) 90-95% 80-85% 60-65% Area (Sq. Ft.)
12x24x4 1000 .85 .80 .65 48
16x20x4 1111 .85 .80 .65 53
16x25x4 1389 .75 .70 .55 66
18x24x4 1500 .75 .70 .55 71
20x20x4 1388 .75 .70 .55 66
20x24x4 1666 .75 .70 .55 79
20x25x4 1736 .75 .70 .55 82
24x24x4 2000 .75 .70 .55 95
3
Notes
1. PD represents clean pressure drop in inches w.g. Recommended final pressure drop for all models
is 1.5 inch w.g.
2. Actual filter face size of 24” x 24” and 24” x 12” is 5/8” undercut on height and width. All other sizes
are 1/2” undercut on height and width. Actual filter depth is 3-3/4”
3. Efficiency is average and is based on ASHRAE Standard 52.1 and 52.2 test methods.
4. Performance tolerances conform to Section 7.4 of ARI Standard 850.
5.
Perfmormance values shown in this publication may be averages or estimates intended to generally represent product
styles. Always contact factory for latest actual test data on specific Flanders Precisionaire models
.
Prefilters
Prefilters are always a wise choice for the protec-
tion of minipleat filters no matter what the efficiency
or brand. The closely-spaced pleats are subject to
face-loading (bridging) by lint and coarse particles,
thus reducing their usual long life. A minimum 25-
30% ASHRAE efficiency pleated panel filter such
as the Flanders Precisionaire Prepleat 40 is recom-
mended.
Save In-Line Space
Compare the airway lengths of 22” PrecisionPak
bag filters and 12” Rigid-Air filter to a 4”
PrecisionCell filter when they are installed with 2”
prefilters.
VAV Systems
Filter banks should be sized so that the face veloc-
ity at maximum design conditions is 625 fpm or
less. PrecisionCell II filters may be applied at any
capacity between 0 and 625 fpm. Operating a filter
bank at reduced flow will greatly increase expected
filter life.
Save Storage Space and Shipping Costs
Using the 24” x 24” size as an example, a carton of
four PrecisionCell II 4” filters has a volume of 5.3
cubic feet and a weight of 26 lbs. Compare this to
four 12” deep rigid separator-type filters packed in
four cartons with a total volume of 16 cubic feet and
total weight of 80 lbs.
Standard Box Style
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Flanders PrecisionAire - Foremost in Air Filtration
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