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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