Precisionaire PB1104 Application Guidelines, Gasketed Headers, Prefilters, Guide Specifications

Application Guidelines

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.

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.

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 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.

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
1.1 Medium and high efficiency self-supporting filters		steel casings and assembled into a corrosion-
		resistant steel header.
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	3.0 Performance
as scheduled on the drawings.
	3.1 Initial and final resistances shall not exceed the
2.0 Filter Construction		scheduled values.
2.1 Filters shall be constructed of 100% synthetic	3.2 Media area must equal or exceed that of the spec-
media of sufficient rigidity to maintain self-support-		ified filter.
ing pockets.	3.3 The average efficiency shall be as determined
2.2 Open area on the filter face for air passage shall		by the ASHRAE Standard 52.1 and 52.2 test
not be less than 90%.		methods.
2.3 Pockets shall be 100% welded, with no stitching to	3.4 The manufacturer shall guarantee performance as
provide protection against leaks and extra blow-out		stated in its literature within tolerances as outlined
strength.		is Section 7.4 of ARI Standard 850.

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