20x20x1 air filter, Purolator Hi-E 40 Extended Surface Pleated Air Filter, Nominal Size 20" W x 20" H x 1" D, Actual Size 19-1/2”W x 19-1/2”H x ¾”D, MERV 8, (6-pack)

The Hi-E 40 is a medium efficiency pleated filter, available in 1", 2" or 4" depths and many standard face sizes to accommodate most system requirements. The 100% hydrophobic synthetic media provides nearly 95% average arrestance. The Hi-E 40 is effective as a stand-alone filter or prefilter. All Hi-E 40 filters are designed with a consistent pleat shape on predetermined centers causing dirt to collect evenly over the entire surface of the media. Fully utilizing every square inch results in a slow steady rise in resistance for maximum dust holding capacity. Two mating pieces of die cut beverage board form a double wall frame around all four edges of the filter. Hi-E 40 filters will not rack or warp under normal operating conditions. Compare the performance and value of Hi-E 40 pleats to other types of filters including disposable panel filters, ring panels, pads and frames or permanent filters for efficiency, low resistance, high dust holding capacity, durability and price. The Hi-E 40 line has lower resistance levels to aid in your energy savings goals and objectives. Rated Efficiency: Hi-E 40 filters are rated MERV 8 per AHRAE 52.2-2007. Underwriters Laboratories, Inc. Classification: Hi-E 40 filters are classified U.L. Class 2 per U.L. Standard 900. Gain 1 Point toward LEED Certification - During the process of new construction, install MERV 8 filters at each return air grille for air handlers used during construction. Conduct a two-week building flush out with new air filters and 100-percent outdoor air prior to occupancy.

• Captures airborneparticles and allergens between 3-10 microns in size. , Provides savings onenergy bill, Reduced exposure to airborne allergens, toxins, and irritantsand diminishes the growth of mold and mildew.

• Improved sanitaryconditions set by OSHA standards - Chemical / biological contamination iscontrolled (5) Strength and Rigidity: Hi-E 40 filters will not rack, warp orbend under normal handling or operating conditions.

• The two-piece frameconstruction creates a double-wall thickness around the outer edge. Combinedwith an integral die cut cross members provide and galvanized steel pleatsupport  and you have a provide a rustresistance and rigid high quality filter.

• WaterRepellent Adhesive hold together even when wet. No delaminating, no excessivebuckling, no collapsing.

• The MERV 8 mediahas a Polyvinyl Acetate (PVA) adhesive that is not affected by mold ormicrobial growth. In order to keep your air clean in your home or business,it is important to install replacements every 60 to 90.