ANSI AHRI 850-2004 pdf download

01-20-2023 comment

ANSI AHRI 850-2004 pdf download Performance Rating of Commercial and Industrial Air Filter Equipment
1.1 Purpose. The purpose of this standard is to establish for commercial and industrial Air Filter Equipment: definitions;
classifications; test requirements; rating requirements; minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions.
1.1.1 Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers,contractors and users.
1.1.2 Review and Amendment. This standard is subject to review and amendment as technology advances.
Section 2. Scope
2.1 Scope. This standard applies to factory-made Air Filter Equipment and Air Filter Media as used in such equipment, for removing particulate matter, when used in environmental conditioning of inhabited spaces in commercial and industrial facilities.
2.2 Exclusions. This standard does not apply to the following:
2.2.1 Air Filter Equipment and Air Filter Media for removing particulate matter, when used in industrial or commercial processes not associated with environmental conditioning of inhabited space.
2.2.2 Air Filter Equipment when used in removing abnormally high concentrations of specific contaminants.
2.2.3 Appliances which include Air Filter Equipment in combination with fans, coils, dampers, etc., but can be applied to the Air Filter Equipment as used therein.
2.2.4 Residential air filter equipment covered by ARI Standard 680.
2.2.5 This standard is not intended to apply to HEPA Filters.
Section 3. Definitions
All terms in this document shall follow the standard industry definitions in the current edition of ASHRAE Terminology of Heating, Ventilation, Air Conditioning and Refrigeration unless otherwise defined in this section.
3.1 Air Filter Equipment. Air cleaning equipment used for removing particulate matter.
3.2 Air Filter Media. The part of the Air Filter Equipment which is the actual particulate removing agent. In the case of Group III equipment (Section 4), the terms charging section and/or collecting section shall be used.
3.3 Average Atmospheric Dust Spot Efficiency. The average value of the dust-spot efficiencies made on a single filter during the loading test, weighted by dust fed to the filter during the intervals between successive dust-spot tests.
3.4 Average Synthetic Dust Weight Arrestance. The average value of arrestances made on a single filter during the loading test,weighted by the synthetic dust fed to the filter between successive arrestance measurements.
3.5 Dust Holding Capacity. For disposable and manually renewable devices, the average arrestance multiplied by the amount of ASHRAE dust fed to the device measured to the nearest gram. Dust is fed until either of these conditions occurs:
a. The resistance of the device reaches the Rated Final Resistance.

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