When it comes to MERV 4 Air Filters, you can count on Grainger. Supplies and solutions for every industry, plus easy ordering, fast delivery and 24/7 customer support.

Choose from our selection of MERV 4 filters, including over 12,900 products in a wide range of styles and sizes. In stock and ready to ship.

20" High x 20" Wide x 5/8" Deep, Polyester Air Filter Paint Arrestor Media Pad. MERV 4, 417 CFM, 99.52% Capture Efficiency, 99.52 Arrestance Efficiency, 150 Max FPM, 175°F Max, Use with Paint Booth Overspray

Order Koch 582-024-024 - 24x24x4 Fiberglass Air Filter Pad, MERV 4 at ISCsales. Great Customer Service. Free Shipping on Qualified Orders.

The media pads and support grilles are continuously glued to the inside perimeter of the frame, resulting in exceptional strength and rigidity ; This design virtually eliminates the possibility of media sag within the frame ; Hot-melt resin sealant ,,

Order Koch 571-020-020 - 20x20x1.5 Polyester Pre-Cut Air Filter Pad, MERV 4 at ISCsales. Great Customer Service. Free Shipping on Qualified Orders.

Application: Suitable as pre-filter in ventilation systems of office buildings,conference rooms,hospitals,shopping malls ,gymnasium,airports and other huge civil architectures as well as pre-filter in gerneral factories of clean rooms. * Can …

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MERV is an industry-standard for how much an air filter pulls out of the air that passes through it. And MERV 4 is on the low end. Not everyone needs the highest level filter to have clean air in their home. But MERV 4 is below what we recommend. The rest of this review will look at why. First, what are the benefits of a MERV 4 air filter?

Glasfloss ZL 20x20x4 MERV 10 AC & Furnace Filters. 6 Pack. Actual Size: 19-1/2 x 19-1/2 x 3-3/4.