Heavy Duty 20" X 20" X 1" Aluminum Mesh Washable Air Filter

Heavy Duty 20" X 20" X 1" Aluminum Mesh Washable Air Filter

(actual size 19.5" X 19.5" X .78")

This sturdy air filter is constructed with seven layers of expanded aluminum mesh surrounded by a heavy aluminum frame.  Designed for air applications such as, light industrial, commercial, schools, office buildings, hospitals and hotels where an especially sturdy permanent washable filter is recommended.

FEATURES:

• Seven crossed layers of corrugated aluminum mesh of various graduations and densities
• Constructed exclusively from Aluminum, giving it a resistance to rust and corrosion
• Long life expectancy
• Can be cleaned many times without losing shape or efficiency
• UL Approved for Air and has surpassed the Federal Specification ASTM F872 required by all government contracts

CLEANING:
Regardless of dust conditions, filters shall be quickly and effectively cleaned with steam or hot water applied with a pressure hose.  For best results, do not use a strong Alkali Solution when cleaning any Aluminum Filter.  Do not soak any aluminum filters in strong alkali. 

CONSTRUCTION:
The filter shall be processed from sheet Aluminum, no less than .025 in thickness expanded to .031 strand.  The material is expanded in a special pattern of various densities of 3/32 x 5/16x 1?.  The filtering element shall consist of not less than seven layers of this media, and assembled so that each layer shall lay at right angles with the preceding layer.  Each layer of media shall be corrugated from 1/4 to 3/8 to provide maximum dust holding capacity.  The filtering element shall be framed in a formed aluminum channel, not less than .037 thickness.  Frame shall be secured so that the face is smooth and free of projections.  Holes shall be punched on one side of frame to facilitate drainage after cleaning.  Filter shall retain 571 grams of dust per 2.25 sq. feet of filter area.  Resistance when clean is .077 wg at 350 FPM air velocity.