Precision Pak XDH
Semi-Rigid, High Dust Holding Capacity
Extended Surface Bag Filter
Bulletin PB1102-1206
General
Precision Pak XDH high dust holding capacity
extended surface bag filters are designed for use
in most commercial or industrial HVAC systems
where medium to high efficiency filtration is
required. Precision Pak XDH filters are available in
micro-fine polyolefin synthetic media with average
efficiency ranges of 65%, 85% and 95% per
ASHRAE Standard 52.1 and 52.2 test methods.
Operating face velocities up to 625 fpm are available for all models.
Ideal for VAV
Precision Pak XDH filters in depths up to 22” aresemi-rigid and thus ideally suited for variable air
volume systems. Precision Pak XDH filters are UL
900 Class 2 listed.
Dual Phase Media
Precision Pak XDH bag filters use dual phase
polyolefin synthetic media. The media is thermally bonded without binders and consists of nonwoven continuous hydrophobic (water repellent)
fibers that resist water and most chemicals. In
addition, the media is gradient density, dual stage
and electrostatically enhanced for extra high dust
holding (XDH) capacity. Further, the media is nonshedding and performs exceptionally well in high
velocity and turbulent applications.
Extra High Dust Holding
A typical XDH bag filter was tested for ASHRAE
synthetic dust holding capacity against similar filters with fiberglass and meltblown synthetic
media. Results showed that the XDH filter held
approximately 150% more dust by weight than the
others when run to the same final resistance. This
characteristic makes it an excellent choice for very
dusty areas and for those systems where long
service life and reduced maintenance are key concerns.
Physical Data
Media: Dual Phase, 100% Synthetic
Media Backer: Non-woven polyester
Pocket Sealant: Thermoplastic resin
Pocket Retainer: Corrosion Resistant steel
Header: 13/16” wide corrosion resistant
Operating Limits: 100% RH and 180° F
Actual Header Face Size: Nominal size less 5/8” (e.g.,
a nominal 24” x 24” filter header is actually 23-3/8” x
23-3/8”)
Important Features
• Semi rigid pocket filter
• Extra high dust holding capacity
• Dual stage gradient density electrostatic media
• Low initial pressure drop provides long life
• Wide range of depths and face sizes
• Linear stitching for optimum pocket form
• Three ASHRAE efficiencies: 65%, 85%, 95%
• Pocket perimeter ultrasonically sealed
• MERV 11-14
Flanders Precisionaire - Foremost in Air Filtration
TollFree: 1-800-637-2803
95% XDH Synthetic Media Filters MERV 14
Nominal Number Nom. Nom. Media 375 fpm 500 fpm 625 fpm
Depth of Width Height Area
(inch) Pockets (Inch) (Inch) (sq. ft.) cfm pd cfm pd cfm pd
12 12 24 24 52 1500 0.44 2000 0.64 2500 0.81
12 6 12 24 26 750 0.44 1000 0.64 1250 0.81
22 6 24 24 48 1500 0.37 2000 0.51 2500 0.68
22 3 12 24 24 750 0.37 1000 0.51 1250 0.68
22 8 24 24 64 1500 0.33 2000 0.46 2500 0.62
22 4 12 24 32 750 0.33 1000 0.46 1250 0.62
22 10 24 24 79 1500 0.29 2000 0.42 2500 0.55
22 5 12 24 40 750 0.29 1000 0.42 1250 0.55
26 6 24 24 56 1500 0.33 2000 0.46 2500 0.62
26 3 12 24 28 750 0.33 1000 0.46 1250 0.62
26 8 24 24 75 1500 0.30 2000 0.42 2500 0.57
26 4 12 24 38 750 0.30 1000 0.42 1250 0.57
26 10 24 24 94 1500 0.26 2000 0.39 2500 0.52
26 5 12 24 47 750 0.26 1000 0.39 1250 0.52
30 6 24 24 65 1500 0.29 2000 0.42 2500 0.55
30 3 12 24 33 750 0.29 1000 0.42 1250 0.55
30 8 24 24 87 1500 0.26 2000 0.37 2500 0.51
30 4 12 24 43 750 0.26 1000 0.37 1250 0.51
30 10 24 24 108 1500 0.24 2000 0.35 2500 0.48
30 5 12 24 54 750 0.24 1000 0.35 1250 0.48
85% XDH Synthetic Media Filters MERV 13
Nominal Number Nom. Nom. Media 375 fpm 500 fpm 625 fpm
Depth of Width Height Area
(inch) Pockets (Inch) (Inch) (sq. ft.) cfm pd cfm pd cfm pd
12 12 24 24 52 1500 0.29 2000 0.40 2500 0.64
12 6 12 24 26 750 0.29 1000 0.40 1250 0.64
22 6 24 24 48 1500 0.26 2000 0.37 2500 0.51
22 3 12 24 24 750 0.26 1000 0.37 1250 0.51
22 8 24 24 64 1500 0.23 2000 0.33 2500 0.44
22 4 12 24 32 750 0.23 1000 0.33 1250 0.44
22 10 24 24 79 1500 0.22 2000 0.31 2500 0.42
22 5 12 24 40 750 0.22 1000 0.31 1250 0.42
26 6 24 24 56 1500 0.25 2000 0.36 2500 0.48
26 3 12 24 28 750 0.25 1000 0.36 1250 0.48
26 8 24 24 75 1500 0.22 2000 0.32 2500 0.43
26 4 12 24 38 750 0.22 1000 0.32 1250 0.43
26 10 24 24 94 1500 0.19 2000 0.29 2500 0.40
26 5 12 24 47 750 0.19 1000 0.29 1250 0.40
30 6 24 24 65 1500 0.24 2000 0.35 2500 0.46
30 3 12 24 33 750 0.24 1000 0.35 1250 0.46
30 8 24 24 87 1500 0.20 2000 0.31 2500 0.42
30 4 12 24 43 750 0.20 1000 0.31 1250 0.42
30 10 24 24 108 1500 0.15 2000 0.26 2500 0.37
30 5 12 24 54 750 0.10 1000 0.26 1250 0.37
Performance values stated may be averages typical of the products listed. Contact factory for actual performance test
reports on specific products.
How to Select a Precision Pak XDH Filter:
• Determine the ASHRAE efficiency desired.
• Determine the face velocity needed to fit the system.
• Select the shortest depth possible with a pressure drop that is acceptable.
• Select the most economical filter based on the number of pockets per 24” x 24” size.
65% XDH Synthetic Media Filters MERV 11
Nominal Number Nom. Nom. Media 375 fpm 500 fpm 625 fpm
Depth of Width Height Area
(inch) Pockets (Inch) (Inch) (sq. ft.) cfm pd cfm pd cfm pd
12 12 24 24 52 1500 0.28 2000 0.37 2500 0.62
12 6 12 24 26 750 0.28 1000 0.37 1250 0.62
22 6 24 24 48 1500 0.25 2000 0.35 2500 0.48
22 3 12 24 24 750 0.25 1000 0.35 1250 0.48
22 8 24 24 64 1500 0.22 2000 0.31 2500 0.42
22 4 12 24 32 750 0.22 1000 0.31 1250 0.42
22 10 24 24 79 1500 0.21 2000 0.29 2500 0.40
22 5 12 24 40 750 0.21 1000 0.29 1250 0.40
26 6 24 24 56 1500 0.24 2000 0.34 2500 0.46
26 3 12 24 28 750 0.24 1000 0.34 1250 0.46
26 8 24 24 75 1500 0.21 2000 0.30 2500 0.41
26 4 12 24 38 750 0.21 1000 0.30 1250 0.41
26 10 24 24 94 1500 0.18 2000 0.26 2500 0.37
26 5 12 24 47 750 0.18 1000 0.26 1250 0.37
30 6 24 24 65 1500 0.23 2000 0.33 2500 0.44
30 3 12 24 33 750 0.23 1000 0.33 1250 0.44
30 8 24 24 87 1500 0.19 2000 0.29 2500 0.40
30 4 12 24 43 750 0.19 1000 0.29 1250 0.40
30 10 24 24 108 1500 0.14 2000 0.24 2500 0.35
30 5 12 24 54 750 0.14 1000 0.24 1250 0.35
Performance values stated may be averages typical of the products listed. Contact factory for actual performance test
reports on specific products.
How to Select a Precision Pak XDH Filter:
• Determine the ASHRAE efficiency desired.
• Determine the face velocity needed to fit the system.
• Select the shortest depth possible with a pressure drop that is acceptable.
• Select the most economical filter based on the number of pockets per 24” x 24” size.
600
500
65% Synthetic
85% Synthetic
95% Synthetic
400
300
XDH
200
100
Grams of dust held
Fiber
Glass
Synthetic
0
Comparison of XDH to fiberglass
and synthetic filters with the same
media content.
Data in graph is for a 26” deep, 10 pocket bag.
Flanders PrecisionAire - Foremost in Air Filtration
Toll Free: 1-800-637-2803
Application Guidelines
Precision Pak XDH filters should be selected using
24” x 12” and 24” x 24” face sizes. This allows for 12”
increments in height and width of the filter bank and
insures that replacement filters will be readily available.
Precision Pak XDH filters should be installed with
pockets vertical wherever possible. It is acceptable to
install 24” x 12” face size filters with pockets horizontal if necessary to meet the size requirements of the
filter banks.
VAV Systems
VAV systems can be designed using the full range
depth of Precision Pak XDH filters. Filter banks
should be sized so that the maximum rated flow at
design conditions falls within the published recommended velocities. Precision Pak XDH filters in all
standard depths can be applied at any capacity
between zero flow and catalog-rated capacities.
Installation Considerations
Precision Pak XDH bag filters may be installed in
Flanders Astr Holding Frames, K-Trac Filter Framing
Modules, Sureseal Side Access Housing or in similar
existing hardware.
Astr Holding Frames are riveted together to form a
bank and may be installed for upstream or downstream service. K-Trac Filter Framing Modules are
especially suitable for medium to large built-up filter
banks. Smaller systems and systems with minimum
upstream access space are best served using
Sureseal Side Access Housings.
Gasketed Headers
Precision Pak XDH filters installed in Flanders K-Trac
Filter Framing Modules or Sureseal Side Access
Housings require polyfoam gaskets on opposite header sides to prevent air bypass.
To specify Precision Pak XDH filters with gasketed
headers, add suffix “S” or “H” to the model number.
Use “S” gaskets on the sides parallel to the pockets
and “H” for gaskets on sides perpendicular to the
pockets.
Prefilters
Properly selected bag filters without prefilters will generally require changeout annually in typical HVAC
applications. Because of the frequent maintenance
expense and increase in fan kW input using prefilters,
they are seldom recommended on lower efficiency
final filters.
Guide Specifications
1.0 General
1.1 Medium and high efficiency self-supporting filters shall be Precision Pak XDH extended surface type as manufactured by Flanders.
1.2 Filter sizes, efficiencies and capacities shall be
as scheduled on the drawings.
2.0 Filter Construction
2.1 Filters shall be constructed of polyolefin microfine synthetic media encased in a thin nonwoven polyester backer mat.
2.2 Open area on the filter face for air passage shall
be not less than 90%.
2.3 Flexible internal support stitching shall maintain
individual pockets in a controlled form under all
rated air flow conditions. Stitching shall be
sealed with thermoplastic resin. Edges shall be
finished with a four-thread overlock stitch to prevent air bypass.
REPRESENTED BY:
2.4 Pockets shall be bonded to galvanized steel casings and assembled into a galvanized steel
header with reverse-hemmed edges for safety.
2.5 Headers shall be gasketed with polyfoam on
vertical sides to prevent leakage when installed
in framing modules or Side Access Housings.
2.6 Filters shall be UL 900 Class 2 listed.
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 the ASHRAE Standard 52.1 and 52.2 test
methods.
3.4 The manufacturer shall guarantee performance
as stated in its literature within tolerances as
outlined is Section 7.4 of ARI Standard 850.
Flanders PrecisionAire
Foremost in Air Filtration
Toll Free: 1-800-637-2803
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