Flanders PrecisionCell II M User manual

1
General:
PrecisionCell II extended surface minipleat filters
now offer the end user high efficiency filtration per-
formance in minimal media pack depths of 4 inch-
es deep in 60-65% (MERV 11), 80-85% (MERV
13), and 90-95% (MERV 14-15), and are available
in a corrosion resistant metal frame (M) for box
style or optional metal frame with a single 13/16"
header (MSH).
Due to the rigid minipleat technology in combina-
tion with the metal frame design, PrecisionCell II's
are the ideal choice for use in existing and new
installations where space is limited or where
upgrading filter efficiency levels are required in
existing units. Variable air volume systems, turbu-
lent airflow, or high humidity applications where
conventional filters fail, are good choices for
upgrading to PrecisionCell II's in metal frame con-
figurations.
PrecisionCell II 4 inch deep in M and MSH designs
are designed to be operated at 500 FPM. Both M
and MSH Model PrecisionCell II's are offered in all
standard sizes. Special sizes are not available.
All PrecisionCell II models utilize state of the art
minipleat technology which uses media separators
made from thermoplastic glue beads to allow preci-
sion spacing between the moisture-resistant
microfine fiberglass media. The adjacent polymer
bead separators cure into durable, hard strips sep-
arating the media folds thereby creating a rigid
pack assembly which maintains excellent pleat
spacing continuity over the life of the filter.
Both PrecisionCell II metal-framed models are
bonded and sealed into a corrosion-resistant, metal
frame with an expanded metal face grille on the
downstream side to prevent media pack oscillation
or blowout. Both metal framed models are the ideal
choice where HVAC Systems pull in 100% humid
outside air such as Hospitals.
Important Features
• High Efficiency Filtration in minimal, space-saving
design.
• This unique shallow-depth pack compacts up to 2
times the media area found in conventional 12
inch deep filters.
• 3-to-1 ratio in shipping, storage, handling and dis-
posal costs over conventional 12" deep cells
• Excellent choice for upgrading older systems at a
fraction of the cost.
PrecisionCell II M and MSH
Extended Surface Mini Pleat Filters
in "C" Channel Metal Frame
Extended Surface Mini Pleat Filters
in Metal Frame with Single 13/16" Header
Bulletin PB1006-1106
Flanders PrecisionAire - Foremost in Air Filtration
Toll Free: 1-800-637-2803

2
Construction
In the Flanders Precisionaire tradition of state-of-the-art technology, PrecisionCell II filters are built with a
minipleat media pack to achieve a rugged, compact lightweight, high efficiency filter.
Air Velocity (fpm)
Pressure Drop (in. w.g.)
0 125 250 375 500 625
1.00
0.80
0.60
0.40
0.20
0.00
90-95%
80-85%
60-65%
Nominal 4” PrecisionCell II Pressure Drop vs. Air Velocity
Corrosion resistant metal frame
Pack sealed within frame
Adhesive beads in place of
metal separators allow up to 3
times the media area.
Microfine glass media in your
choice of filtration efficiencies
13-16” metal header on MSH
models
Flanders PrecisionAire - Foremost in Air Filtration
Toll Free: 1-800-637-2803
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.

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
With Header
Flanders PrecisionAire - Foremost in Air Filtration
Toll Free: 1-800-637-2803

1.0 General
1.1 Medium and high efficiency extended surface
filters shall be PrecisionCell II (M) (MHS) mini-
pleat panel filters as manufactured by Flanders
Precisionaire.
1.2 Filter sizes, efficiencies and capacities shall be
as scheduled on the drawings.
1.3 Filters shall be UL 900 Class 2 listed.
2.0 Filter Construction
2.1 The filter pack shall be constructed of water-laid
microfine fiberglass media containing a water
repellent binder formed into closely spaced pleats
held in position by adhesive bead separators.
2.3 The filter pack shall be enclosed and sealed with-
in a corrosion-resistant metal frame.
2.4 PrecisionCell II MSH filters shall have a single
13/16” diameter header on the air entering side.
3.0 Performance
3.1 Initial and final resistances shall not exceed the
scheduled values.
3.2 Media area must equal or exceed that of the
specified filter
3.3 The average efficiency shall be as determined
by ASHRAE Standard 52.1 and 52.2 test
methods.
3.4 The manufacturer shall guarantee performance
as stated in the literature within tolerances as
outlined in Section 7.4 of ARI Standard 850.
4
Guide Specifications
Application Guidelines
PrecisionCell II filters should be selected for
new installations with 24” H x 24” W and 24”
H x 12” W face sizes. These are the most
widely used and stocked sizes. This allows
for 12” increments in height and width of the
filter bank and insures that replacement car-
tridges will be readily available.
PrecisionCell II filters should be installed with
the pleats vertical wherever possible. It is
permissible to install 24” H x 12” W face size
filters with pleats horizontal if necessary to
meet the size requirements of the filter bank.
HEPA Prefilters
PrecisionCell II filters are ideal as prefilters
for Alpha Cell HEPA filters. Their light weight
and 4” depth make them an excellent choice
for installation in the optional Prefilter Frame Assembly for the Alpha Cell HEPA Filter Holding Frame or in
Surelock Side Access HEPA Housings.
Specify the Surelock housing with an optional 4” wide prefilter track for the PrecisionCell II filters, in lieu of
the 2” wide prefilter track for pleated panel filters. We recommend the selection of 80-85% PrecisionCell II
filters as HEPA prefilters.
PrecisionCell II M and MSH
Component Chart
88655. 04 20 24 MSH D
Efficiency Series
89655. - 90-95%
88655. - 80-85%
86655. - 60-65%
Nominal Depth
04 - 3.75” Deep
Nominal Width
20 - (19-3/8”) wide
Nominal Height
24 - (23-3/8”) tall
Frame Style
MSH - Metal
w-13/16”
Single Header
Gasket Location
D - Downstream
U - Upstream
V - One Vertical Side
REPRESENTED BY:
Flanders PrecisionAire
Foremost in Air Filtration
Toll Free 1-800-637-2803