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Need a different depth?

Same size, deeper filter

Below is 18x30 at 1 naturalaire″. A thicker filter holds more before it loads up, so it lasts longer between changes and puts less strain on the blower — we carry the same width and height in the depths below.

18x30x2 Built to order 18x30x4 Built to order

Ordering for a building? Ask for volume pricing or call 1-866-469-8556.

  • 18x30x1 Koch Multi-Pleat XL10 MERV 10 102-111-044 (12 Filters)
    MERV 10
    Koch

    18x30x1 Multi-Pleat XL10 MERV 10

    $231.72
    $231.72
    Case of 12 $19.31/filter
  • 18x30x1 Koch Multi-Pleat XL11 MERV 11 High Capacity 102-081-044 (12 Filters)
    MERV 11 HC
    Koch

    18x30x1 Multi-Pleat XL11 MERV 11 High Capacity

    $282.84
    $282.84
    Case of 12 $23.57/filter
  • 18x30x1 Koch Multi-Pleat XL8 Standard Capacity MERV 8 102-041-044 (12 Filters)
    MERV 8
    Koch

    18x30x1 Multi-Pleat XL8 MERV 8 Standard Capacity

    $154.99
    $154.99
    Case of 12 $12.92/filter
  • 18x30x1 Koch Multi-Pleat XL10 MERV 10 High Capacity 102-121-044 (12 Filters)
    MERV 10 HC
    Koch

    18x30x1 Multi-Pleat XL10 MERV 10 High Capacity

    $292.80
    $292.80
    Case of 12 $24.40/filter
  • PrimeShield WashGuard Metal HVAC Air Filter - Washable & Reusable
    MERV 8
    RTF

    PrimeShield WashGuard Metal HVAC Air Filter - Washable & Reusable

    From $149.99
    From $149.99
  • 18x30x1 Exact Filters Pleated MERV 11 (12 pack)
    MERV 11
    Exact Filters

    18x30x1 Pleated MERV 11

    $263.99
    $263.99
    Case of 12 $22.00/filter
  • 18x30x1 Koch Disposable Fiberglass Panel 274-180-300 (12 Filters)
    MERV 1-4
    Koch

    18x30x1 Disposable Fiberglass Panel Filter

    $102.99
    $102.99
    Case of 12 $8.58/filter
  • 18x30x1 Koch Disposable Polyester Panel 284-180-300 (12 Filters)
    MERV 1-4
    Koch

    18x30x1 Disposable Polyester Panel Filter

    $95.99
    $95.99
    Case of 12 $8.00/filter
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