Part / accessory · AprilAire

AprilAire 313 MERV 13 air filter

verified 2026-10-13 Specs from AprilAire shop - 313 MERV 13 Air Filter. Also known as: aprilaire 313.

Specs

categorywhole-house media air filter
merv13
replacement months12
nominal size (in)20x20x4
actual size (in)19.58 x 21.38 x 4

Fits

  • HVAC media filter AprilAire 20x20 media filter (310 / 313 family)
    4-inch media filters for AprilAire 20x20 cabinets: 1310, 2310, 3310 and 4300.

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Good to know
  • Nominal 20x20x4; actual about 19.58 x 21.38 x 4 in.
  • Not interchangeable with the 20x25 or 16x25 families.
  • AprilAire is moving these cabinets to 3-inch TriPure filters sold as kits with one-time upgrade rails (UK-series). Later TriPure refills (3F-series) need those rails installed; a classic 4-inch media filter does not use them.

What does the AprilAire 313 MERV 13 air filter work with?

1 models in the graph.

Informational only. Confirm with the manufacturer before buying or installing. Spotted a mistake? Report it.