For all your containment air filtration needs, 
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A Wholly Owned Subsidiary of Flanders Corporation
Air Filtration Systems for Industrial, Research and Military facilities that handle dangerous
or toxic biological, radiological or carcinogenic materials.

PrecisionCell II

Extended Surface Mini Pleat
  Optional Model     In-Line Space-Saving Design     Physical Data     Construction 
Surepleat Side-Access Housings     Prefilters     Save In-Line Space     VAV Systems
Save Storage Space and Shipping Costs     Application Guidelines     HEPA Prefilters   
  PrecisionCell II extended surface minipleat rigid filters are a nominal four inches deep.  They are designed for use in most commercial and industrial HVAC systems where medium to high efficiency filtration is required. 
 
  • Available in efficiency ranges 
    of  60-65%, 80-85% and 90-95% per ASHRAE Standard 52.1 atmospheric dust spot test methods.
  • PrecisionCell II filters are especially suitable for variable air volume (VAV) systems and are designed to operate at face velocities up to 625 fpm or turbulent flow conditions.
  • Space-saving 4 in. thickness for installation flexibility.
  • Rugged moisture-resistant bonded frame and unitized pack for rigidity.
  • Lightweight and easy to store and handle.


PrecisionCell II filters ae UL 900 Class 2 listed.

Two styles are available:  

  1. standard box style 
  2. an optional headered (top and bottom) version that is manufactured with a header for use with existing side access housings.
Optional Model

Optional headered version PrecisionCell II filters are the same size and have the same functional design as the standard model.  The filter is built with a metal-reinforced header on the top and bottom of the filter near the air entering side.  The header allows the filter to fit over the standing flanges of the primary filter channel in existing side access housings.  Headered PrecisionCell II filters are furnished with a 1/2-inch wide polyfoam gasket on their vertical sides to provide a filter-to-filter seal.

In-Line Space-Saving Design

PrecisionCell II filters dramatically reduce in-line space requirements when compared to 12-inch to 36-inch deep filters.  Their nominal 4 inch depth makes a convenient fit for most installations.  High efficiency filtration, that is often required for acceptable Indoor Air Quality, may now be selected by the design engineer without having to compromise space.

Installation Considerations

PrecisionCell II filters may be installed in Flanders Type 9 Holding Frames and Surepleat Side Access Housings or similar existing hardware.  Type 9 Holding Frames are riveted together to form a bank and may be installed for upstream or downstream service.  Smaller systems and systems with minimum upstream access space are best served using Surepleat Side Access Housings.

Physical Data

Frame:  Double-wall, moisture-resistant beverage board

Media:  Water-laid microfine fiberglass with a water-repellent binder

Media Support:  Adhesive-bead pleat separators

Face Grid:  Horizontal and diagonal supports bonded to the media pack

Operating Limits:  160 degrees F and 100% RH

Construction

In the Flanders 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.

 

Surepleat Side Access Housings

Use a Surepleat Side Access Housing as a
convenient and space-saving method of installing PrecisionCell II filters.  SP2/4 housings have two gasketed extruded aluminum tracks to accept 2-inch pleated prefilters and 4-inch PrecisionCell II final filters.

The adjacent photo shows a Surepleat Side-Access Housing with 2-inch Prepleat 40 pleated prefilters and PrecisionCell II final filters.

 

 

  
    Prefilters

Prefilters are always a wise choice for the protection 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 Prepleat 40 is recommended.

Save In-Line Space

Compare the airway lengths of 22-inch PrecisionPak bag filters and 12-inch Rigid-Air filter to a 4-inch PrecisionCell filter when they are installed with 2-inch prefilters.

Filter banks should be sized so that the face velocity 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-inch x 24-inch size as an example, a carton of four PrecisionCell II 4-inch filters has a volume of 5.3 cubic feet and a weight of 26 lbs.  Compare this to four 12-inch deep rigid separator-type filters packed in four cartons with a total volume of 16 cubic feet and total weight of 80 lbs.

VAV Systems

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-inch increments in height and width of the filter bank and insures that replacement cartridges 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 banks.

HEPA Prefilters

PrecisionCell II filters are ideal as prefilters for Alpha Cell HEPA filters.  Their light weight and 4-inch 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-inch wide prefilter track for the PrecisionCell II filters, in lieu of the 2-inch wide prefilter track for pleated panel filters.  We recommend the selection of 80-85% PrecisionCell II filters as HEPA prefilters.

Capacities and Dimensions

Other Standard Size PrecisionCell II Filters

Notes:

  1. PD represents clean pressure drop in inches w.g.  The recommended final pressure drop for all models is 1.5 in. w.g.

  2. Operation down to zero air flow is satisfactory for all models.

  3. Actual filter face size of 24 in. x 24 in. x 12 in. is 5/8 in. undercut on height and width.  All other sizes are 1/2 in. undercut on height and width.  Actual filter depth is 3-3/4 in.

  4. Efficiency is average and is based on ASHRAE Standard 52.1 test methods.

  5. Performance tolerances conform to Section 7.4 of ARI Standard 850.

  6. PrecisionCell II 24 in. x 12 in. filters are available with notches on the 24 in. horizontal sides.  Contact factory to order.

Guide Specifications
1.0 General 3.0 Performance
1.1   Medium and high efficiency extended surface filters shall be PrecisionCell II minipleat panel filters as manufactured by Flanders, Inc. 3.1 Initial and final resistances shall not exceed the scheduled values.
1.2 Filter sizes, efficiencies and capacities shall be as scheduled on the drawings. 3.2 Media area must equal or exceed that of the specified filter.
1.3 Filters shall be UL 900 Class 2 listed. 3.3 The average efficiency shall be as determined by ASHRAE Standard 52.1 test methods.
2.0 Filter Construction 3.4 The manufacturer shall guarantee performance as stated in the literature within tolerances as outlined in Section 7.4 of ARI Standard 850.
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.  
2.2 The filter pack shall be strengthened on the air-entering and air-exit sides with horizontal and diagonal support members.    
2.3 The enduring frame shall be double-wall water-resistant beverage board sealed  between the walls to the filter pack with adhesive.