THE ENVIRONMENTAL TECHNOLOGY VERIFICATION PROGRAM

  &EPA                                                          HRTI
                                                                              INTERNATIONAL
U.S. Environmental Protection Agency                                                       Research Triangle Institute

                       ETV Joint Verification Statement
        TECHNOLOGY TYPE:    VENTILATION MEDIA AIR FILTER

        APPLICATION:           FILTRATION EFFICIENCY OF BIOAEROSOLS IN
                                   HVAC SYSTEMS

        TECHNOLOGY NAME:   Excel Filter, Model SBG24242898

        COMPANY:               Glasfloss Industries, Inc.

        ADDRESS:                400 S. Hall Street          PHONE: 214 741-7056
                                   Dallas, TX 75226          FAX: 214 741-4556
        WEB SITE:                http://www.glasfloss.com/
        E-MAIL:                  mfilewood@glasfloss.comm
     The U.S. Environmental Protection Agency (EPA) has created the Environmental Technology
     Verification (ETV) Program to facilitate the deployment of innovative or improved
     environmental technologies through performance verification and dissemination of information.
     The goal of the ETV Program is to further environmental protection by accelerating the
     acceptance and use of improved and cost-effective technologies. ETV seeks to achieve this goal
     by providing high quality, peer-reviewed data on technology performance to those involved in
     the design, distribution, financing, permitting, purchase, and use of environmental technologies.

     ETV works with recognized standards and testing organizations; stakeholder groups which
     consist of buyers, vendor organizations, permitters, and other interested parties; and with the full
     participation of individual technology developers. The program evaluates the performance of
     innovative and improved technologies by developing test plans that are responsive to the needs
     of stakeholders, conducting field or laboratory tests (as appropriate), collecting and analyzing
     data, and preparing peer-reviewed reports. All evaluations are conducted in accordance  with
     rigorous quality assurance protocols to  ensure that data of known and adequate quality are
     generated and that the results are defensible.

     EPA's National Risk Management Research Laboratory contracted with the Research Triangle
     Institute (RTI) to establish a homeland-security-related ETV Program for products that clean
     ventilation air.  RTI evaluated the performance of ventilation air filters used in building heating,
     ventilation and air-conditioning (HVAC) systems. This verification statement provides a
     summary of the test results for the Glasfloss Industries, Inc. Excel filter.
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VERIFICATION TEST DESCRIPTION
All tests were performed in accordance with RTFs "Test/Quality Assurance Project Plan:
Biological Testing of General Ventilation Filters," which was approved by EPA. Tests were
performed for the following:
   •   Bioaerosol filtration efficiency tests of the clean and dust-loaded filter. Three bioaerosols
       were used in the testing:
          o  The spore form of the bacteria Bacillus atrophaeus (BG), a gram-positive spore-
             forming bacteria elliptically shaped with dimensions of 0.7 to 0.8 by 1 to 1.5 //m,
          o  Serratia marcescens, a rod-shaped gram-negative bacteria with a size of 0.5 to 0.8
             by 0.9 to 2.0 //m, and
          o  The bacterial virus (bacteriophage) MS2 dispersed as a micrometer-sized
             poly disperse aerosol.
   •   American National Standards Institute (ANSI)/American Society of Heating,
       Refrigerating and Air-Conditioning Engineers (ASHRAE) Standard 52.2-1999 test. The
       test uses inert [potassium chloride (KC1)] particles for a filter when clean and through
       five levels of dust loading. The filtration efficiency results (average of the minimum
       composite efficiency) are given for three size ranges of particles: El, 0.3 to 1.0 //m; E2,
       1.0to3.0//m; andE3, 3.0//mto 10//m.
   •   Inert aerosol filtration efficiency tests similar to the  ASHRAE 52.2 test (0.3 to 10 |im)
       but with extended fractional efficiency measurements down to 0.03 jim particle diameter
       on a filter when clean and when fully dust-loaded.
VERIFIED TECHNOLOGY DESCRIPTION
As shown in Figure 1, the Glasfloss Industries, Inc. Excel
Filter, Model SBG24242898 is an 8-pocket bag filter with
a metal header and nominal dimensions of 0.61 by 0.61
by 0.71 m (24 x 24 x 28 in.). The media is a white and
yellow synthetic.

VERIFICATION OF PERFORMANCE
Verification testing of the Glasfloss Industries, Inc. Excel
filter began on May 13, 2004 at the test facilities of RTI
and was completed on June 2, 2004.  The results for the
bioaerosol filtration efficiency tests are presented in
Table 1 for the clean and dust-loaded filter. Table 2
presents the results of the ASHRAE 52.2 test. All tests
were conducted at an air flow of 0.93 mVsec (1970 cfm).
Figure 1. Photograph of the Glasfloss
     Industries, Inc. Excel filter.
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                             Table 1. Bioaerosol Filtration Results
Filter Condition
Clean
Dust loaded
Pressure Drop
Pa (in. H2O)
82 (0.33)
348(1.40)
Filtration
Efficiency for
Removal of
B. atrophaeus , %
91
98
Filtration
Efficiency for
Removal of
S. marcescens, %
91
98
Filtration
Efficiency for
Removal of
MS2 phage, %
96
99.5
                           Table 2. Summary of ASHRAE 52.2 Test
Filter
Glasfloss Industries,
Inc. Excel filter
El
0.3 to 1.0 //m,
%
77
E2
1.0 to 3.0 //m,
%
97
E3
3.0 to 10 Aim,
%
100
Minimum Efficiency
Reporting Value
(MERV)
14 at 0.93m3/sec
(1970 cfm)
The quality assurance officer reviewed the test results and the quality control data and concluded
that the data quality objectives given in the approved test/QA plan were attained.

This verification statement addresses three performance measures of media air filters: filtration
efficiency for inert particles; removal efficiency for selected bioaerosols and pressure drop.
Users of this technology may wish to consider other performance parameters such as service life
and cost when selecting a media air filter for bioaerosol control. In accordance with the test/QA
plan1, this verification statement is valid for 3 years following the last signature added on the
verification statement.
Original signed by E. Timothy Oppelt, 8/23/04      Original signed by David S. Ensor,  8/5/04
E. Timothy Oppelt                   Date
Director
National Homeland Security Research Center
Office of Research and Development
United States Environmental Protection Agency
David S. Ensor
Director
ETV-HS
Research Triangle Institute
Date
   NOTICE: ETV verifications are based on an evaluation of technology performance under specific, predetermined
   criteria and the appropriate quality assurance procedures. EPA and RTI make no expressed or implied warranties
   as to the performance of the technology and do not certify that a technology will always operate as verified. The
   end user is solely responsible for complying with any and all applicable federal, state, and local requirements.
   Mention of commercial product names does not imply endorsement.
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