SwissAire
Self Supporting Synthetic Media Bag Filters
Bulletin PB1104-1206
General
ASTR Holding Frames are riveted together to form
a bank and may be installed for upstream or down-
stream 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.
SwissAire is a very high strength, synthetic media
bag filter. Pockets are nearly rigid, making them
self supporting for full media use and no pocket sag.
Pockets are also fully welded instead of stitched.
That means less chance of pin-hole leaks and very
high blow-out strength. Headers on SwissAire bag
filters are all 16 gauge galvanized steel, not plastic
that can crack or warp.
Physical Data
SwissAire synthetic, self supporting bag filters are
designed for use in most commercial or industrial
HVAC systems where medium to high efficiency fil-
tration is required. SwissAire Filters are available in
minimum efficiency levels of 50%, 60% and 90%
per ASHRAE Standard 52.1 test methods. Offered
as MERV 8-15 per ASHRAE Standard 52.2
SwissAire bag filters are UL 900 Class 1 listed.
Media: A nearly rigid, high strength synthetic medium.
- Progressive density fiber matrix designed for high
dust holding capacity.
- 100% synthetic medium performance results
from strictly mechanical particle collection mecha-
nisms. Performance of the product is not afffected
by preconditioning step proposed to ASHRAE 52.2
Pocket Retainer: Corrosion resistant steel or aluminum
Header: 13/16” wide corrosion-resistant steel
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”)
Installation Considerations
SwissAire bag filters may be installed in Flanders
ASTRl Holding Frames, K-Trac Filter Framing
Modules, Sureseal Side Access Housings, or in
similar existing hardware.
Important Features
• Nearly rigid pockets are self supporting and allow
for full media use with no pocket sag
• 100% synthetic media
• Low initial pressure drop provides longer life.
• Welded pockets, no stitching for better integrity and
higher blowout strength.
• Wide range of cartridge depths, efficiencies
and operating capacities are available.
• MERV 8-15
• UL 900 Class 1
Flanders Presicionaire - Foremost in Air Filtration
Toll Free: 1-800-347-2220
1
SwissAire Particle Collection Efficiency
100.0
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
SA60
SA90
0.1
1.0
10.0
Particle Size (micron)
SwissAire Rigid Bag Filters 24” x 24” x 26” (8) Pocket Tested at 2,000 CFM
per ASHRAE Standard 52.2. Data reflects the Composite Minimum Efficiency
Pressure Drop vs Air Flow Rate
0.60
SA5054426
SA6064426
SA9084426
0.50
0.40
0.30
0.20
0.10
0.00
0
200
400
600
800
1000
1200
1400
1600
1800
2000
Airflow Rate
Dust Holding Capacity SwissAire vs Rigid Air
2.00
SA 60 242412 (6) pkt.
PRP65S4412
1.50
1.00
0.50
0.00
0
100
200
300
400
Dust Fed (grams)
Filters tested at 2000 CFM per ASHRAE Std. 52.1
ASHRAE Standardized Test Dust fed at 2.0 grams per cubic foot of air.
Application Guidelines
Prefilters
SwissAire bag filters should be installed with pock-
ets vertical wherever possible. It is acceptable to
install 24” x 12” face size filters with pockets hor-
izontal if necessary to meet the size requirements
of the filter banks.
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 often recommended
with 90% efficient SwissAire final filters. However,
the energy cost to operate a prefilter seldom war-
rants their use with 50% or 60% filters.
Gasketed Headers
SwissAire bag 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
SwissAire bag filters with gasketed headers, add
suffix ”SA” (side access), “GU” (upstream), “GD”
(downstream) and “GS” (sides) to model number.
Performance values shown in this publication may be averages or estimates intended to generally represent a product style.
Contact factory for latest actual test data on specific Flanders Precisionaire models.
Guide Specifications
1.0 General
2.4 Pockets shall be bonded to corrosion-resistant
steel casings and assembled into a corrosion-
resistant steel header.
1.1 Medium and high efficiency self-supporting filters
shall be SwissAire extended surface type as man-
ufactured by Flanders.
2.5 Filters shall be UL 900 Class 1 rated.
1.2 Filter sizes, efficiencies and capacities shall be
as scheduled on the drawings.
3.0 Performance
3.1 Initial and final resistances shall not exceed the
scheduled values.
2.0 Filter Construction
2.1 Filters shall be constructed of 100% synthetic
media of sufficient rigidity to maintain self-support-
ing pockets.
3.2 Media area must equal or exceed that of the spec-
ified filter.
3.3 The average efficiency shall be as determined
by the ASHRAE Standard 52.1 and 52.2 test
methods.
2.2 Open area on the filter face for air passage shall
not be less than 90%.
2.3 Pockets shall be 100% welded, with no stitching to
provide protection against leaks and extra blow-out
strength.
3.4 The manufacturer shall guarantee performance as
stated in its literature within tolerances as outlined
is Section 7.4 of ARI Standard 850.
REPRESENTED BY:
Flanders - PrecisionAire
Foremost in Air Filtration
Toll Free: 1-800-347-2220
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