• Product label: Special Order

Koch Multi-Pleat XL8 8 x 20 x 1 MERV 8 Pleated Air Filter - 12 Pack

Sale price $264.96 USD Regular price
Regular price $264.96 USD
Unit price $22.08 item
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Koch Multi-Pleat XL8 8 x 20 x 1 MERV 8 Pleated Air Filter - 12 Pack
Sale price $264.96 USD Regular price
Regular price $264.96 USD
Unit price $22.08 item

Product Details

The Koch Multi-Pleat XL8 is a MERV 8 extended-surface pleated filter for gas and oil furnaces, heat pumps and AC air handlers. It fits any system that takes an 8 x 20 x 1 filter (8x20x1). This case contains 12 filters. At a quarterly change, that is three years of filters for one system, or one year for three systems.

Multi-Pleat XL8 uses 100% mechanical filter media, so its efficiency does not depend on an electrostatic charge that can fade over time. A galvanized expanded-metal support grid is laminated to the media to hold the pleats in shape, the pleats are bonded to the frame to prevent air bypass, and the double-wall, moisture-resistant beverage-board frame with reinforced corners stays rigid in humid conditions.

Is This the Right Size?

Air filters are sold by nominal size, the rounded size printed on the frame of your current filter. The filter itself is made slightly smaller so it slides into the filter slot — typically about 1/2" under nominal on length and width, and 3/4" deep for a 1" filter. Match the nominal size printed on your old filter, not a tape measurement of the slot.

Not sure? Send us a photo of the label on your current filter and we will confirm the match before you order.

Specifications

Brand Koch Filter
Series Multi-Pleat XL8
Koch Part Number P8S1-080-200
Nominal Size 8 x 20 x 1
MERV Rating MERV 8 | MERV-A 8 (ASHRAE 52.2-2007)
Media 100% mechanical synthetic media
Media Support Galvanized expanded metal, laminated to media
Frame Double-wall moisture-resistant beverage board, reinforced corners
Quantity 12 filters

What MERV 8 Captures

MERV 8 is the everyday standard for residential systems. Under ASHRAE 52.2 a MERV 8 filter captures at least 70% of particles in the 3–10 micron range (household dust, lint, pollen, dust mite debris and mold spores) while keeping airflow resistance low enough for virtually any furnace or air handler.

Replacement Schedule

Check the filter monthly and replace it at least every three months — sooner in homes with pets, during renovation work, or whenever it looks loaded with dust. Install it with the airflow arrow on the frame pointing toward the blower.

In commercial systems, change the filter when pressure drop across it reaches 1.0" w.g., Koch's recommended final resistance for this filter.

Shop all Koch Filter air filters.

Genuine Koch Filter Replacement Filters

Koch Multi-Pleat filters sold by the full case, with the Koch part number, actual dimensions and case quantity listed on every product.

  • Koch part number on every listing
  • Case pricing on every filter
  • Common and hard-to-find sizes
Koch Filter FAQs

How do I know my size?
Match the size printed on the frame of your current filter. The actual filter is about 1/2" smaller than the nominal size so it slides into the slot.

Which MERV rating should I choose?
MERV 8 is the everyday standard. MERV 11 captures finer dust and pet dander. MERV 13 is Koch’s highest-efficiency pleated option. If your system struggles for airflow, stay at MERV 8 or 11.

How often should I change it?
Check 1" and 2" filters monthly and replace them at least every three months. Deeper 4" and 5" filters typically last 6–12 months.

Why are some sizes special order?
Less common sizes are made by Koch to order. Each listing shows whether it’s in stock or special order.

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