FilterKing · Furnace & AC Filters

FilterKing air filters by size

Made-to-order pleated filters and subscriptions; strong for non-standard sizes. Pick your size below — air filters are universal by dimension, so any FilterKing filter in your size fits your system.

Popular FilterKing sizes

Jump to your size for all MERV options, or grab FilterKing directly.

FilterKing 14x20all MERV →FilterKing 14x25all MERV →FilterKing 16x20all MERV →FilterKing 16x24all MERV →FilterKing 16x25all MERV →FilterKing 18x24all MERV →FilterKing 20x20all MERV →FilterKing 20x25all MERV →FilterKing 20x30all MERV →FilterKing 24x24all MERV →

All sizes

10x20 12x12 12x20 12x24 12x30 12x36 14x14 14x18 14x20 14x24 14x25 14x30 15x20 16x16 16x20 16x24 16x25 16x30 18x18 18x20 18x24 18x25 18x30 20x20 20x24 20x25 20x30 20x36 22x22 24x24 24x30 25x25 30x30 30x36

FilterKing MERV ratings

FilterKing lists filtration on the MERV scale. Here's what each MERV level does.

MERV 8

Standard protection

Captures pollen, dust, lint, dust-mite debris and mold spores. Best for everyday home use — the standard choice to protect your HVAC system.

MERV 11

Allergy & pet

Captures everything MERV 8 does plus pet dander, fine dust and smog particles. Best for homes with pets or mild allergies.

MERV 13

Maximum filtration

Captures everything MERV 11 does plus smoke, bacteria and virus-carrying particles. Best for allergy and asthma sufferers, and homes dealing with wildfire smoke.

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