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 | | 2.01 AIR FILTER TYPES A. Panel Air Filters: Viscous impingement type with average efficiency less than 20 percent based on ASHRAE 52-76, and designed for maximum initial pressure drop of 0.12 inch wg at 300 fpm; UL Class 2 Filters: Airguard Disposables, American Amer-glass, Glasfloss Disposables, or Precisionaire Industrial Grade. |
 | | D. Rigid Air Filters: Extended surface, deep pleated type with average efficiencies based on ASHRAE 52-76; Airguard Vari-Pak (12 inch thick), Farr Riga-Flo (6 inch thick), or Precisionaire Rigi Pleat (12 inch thick). |
 | | Filter pack enclosed and continuously sealed to galvanized steel enclosing frame, and supported by diagonal members bonded to both air entering and air exiting sides. |
| www.ogs.state.ny.us /dnc/masterspec/word/15861.doc (1056 words) |
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