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ChillVentVale

Filters index

Every Filter Page, by Size and by Code

Two different problems live on this page. A furnace filter is shopped by a size that is not the size it measures. A purifier cartridge is shopped by a code printed on the part. They get different treatment below because they need it.

Furnace filter sizes

Nominal size against the actual dimensions the listings state. The right column is the number of filters this catalog stocks at that size.

NominalActual, as statedUnder nominal byMERV in this catalogListings
20x25x119.62–19.68 x 24.62–24.68 x 0.78–0.81 in0.32 to 0.38 in under nominal on the facesMERV 11, MERV 122
20x20x119.50–19.75 x 19.50–19.75 x 0.75 in0.25 to 0.50 in under nominal on the facesMERV 5, MERV 83
16x25x115.50–15.68 x 24.50–24.68 x 0.75–0.81 in0.32 to 0.50 in under nominal on the facesMERV 8, MERV 112
20x30x119.81–19.88 x 29.81–29.88 x 0.81 in0.12 to 0.19 in under nominal on the facesMERV 5, MERV 82
20x25x419.50 x 24.50 x 3.63 in0.50 in under nominal on both facesMERV 81

Purifier cartridge codes

Read the code off the old cartridge, not the name on the front of the machine. Each tile says how many listings here are the manufacturer part and how many are a seller stating compatibility.