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AprilAire · media air cleaner filter

AprilAire UK311 MERV 11 + rails

AprilAire UK311 (Replaces 310) MERV 11 TriPure Filter + Upgrade Rails. Part UK311. Lasts up to 12 months. Fits 6 models.

Buy UK311 MERV 11 + rails on AmazonManufacturer page

Opens an Amazon search for AprilAire UK311 MERV 11 + rails. Check the listing says UK311.

Fits these models

Part numbers

Genuine part
UK311
Replaces
310
Packs
UK311 02 (2-pack)
How often
Lasts up to 12 months
What is in it
MERV 11 TriPure 3-inch filter; one-time upgrade rails
Size
20 x 20 x 4 in nominal (20.61 x 21.75 x 3.68 actual)

Sources

  • Which filter fits shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Compatible Models: 1310, 2310, 3310, 4300, U131, U233
  • How many shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Page for the 1310 (per its URL): Comes with one AprilAire 310 MERV 11 Air Filter
  • How often shop.aprilaire.com Maker's own page checked Oct 1, 2026
    LONG FILTER LIFE – One filter lasts up to 12 months
  • Size shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Nominal Measurements: 20H x 20W x 4D (inches) Actual Measurements: 20.61H x 21.75W x 3.68D (inches)
  • What's in it shop.aprilaire.com Maker's own page checked Oct 1, 2026
    MERV Rating: 11; Materials: Plastic, Synthetic Fiber
  • Packs shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Package sizes: 1-pack UK311; 2-pack UK311 02
Show all 11 sources

Which filter fits

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Compatible Models: 1310, 2310, 3310, 4300, U131, U233
  2. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Product 'AprilAire UK311 (Replaces 310) MERV 11 TriPure Filter + Upgrade Rails', SKUs UK311, UK311 02
  3. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    The AprilAire UK311 replaces the sunsetting AprilAire 310 Filter; 'Your next subscription will be the 3F311 - filter only'

How many

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Page for the 1310 (per its URL): Comes with one AprilAire 310 MERV 11 Air Filter
  2. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Page for the 2310 (per its URL): Comes with one AprilAire 313 MERV 13 Air Filter
  3. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    INCLUDED IN THE BOX: (1) U131 Air Purifier (1) 3F311 Air Filter; Filter Nominal Dimensions (H x W): 20 x 20 (inches)
  4. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    INCLUDED IN THE BOX: (1) U233 Air Purifier (1) 3F313 Air Filter; Filter Nominal Dimensions (H x W): 20 x 20 (inches)

How often

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    LONG FILTER LIFE – One filter lasts up to 12 months

Size

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Nominal Measurements: 20H x 20W x 4D (inches) Actual Measurements: 20.61H x 21.75W x 3.68D (inches)

What's in it

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    MERV Rating: 11; Materials: Plastic, Synthetic Fiber

Packs

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Package sizes: 1-pack UK311; 2-pack UK311 02