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Alternative SmokeBlock replacement filter

Blueair Blue Pure 411i Max, 411a Max SmokeBlock Filter 111237 replacement filter

Blue Pure 411i Max, 411a Max SmokeBlock Filter (part 111237) fits Blueair Blue Pure 411a Max and Blueair Blue Pure 411i Max, according to the official Blueair product page.

Official Blueair fit · checked

Blueair models that use Blue Pure 411i Max, 411a Max SmokeBlock Filter 111237

This filter is listed for 2 models. Open a model to see its complete list of primary, optional, and specialty filters.

Before you order

What to check in a 111237 listing

  • The listing names part 111237. Similar-looking filters are not proof of fit.
  • Your purifier is one of the compatible models: Blueair Blue Pure 411a Max and Blueair Blue Pure 411i Max.
  • The pack size and pieces included match what you need. Genuine and third-party filters can differ.
  • The total price with shipping, seller feedback, and delivery estimate work for you.

Care guidance

Replacement schedule

Blueair states that, depending on usage, the filter will last up to 9 months.

Usage conditions can affect service life. Follow the cited manufacturer guidance for this part.

Compare compatible options

These share at least one compatible model but may do a different job, such as a carbon pre-filter or a specialty version. Check each part page before buying.

Frequently asked questions

How often should I replace the Blueair Blue Pure 411i Max, 411a Max SmokeBlock Filter (111237)?

Blueair states that, depending on usage, the filter will last up to 9 months.

Which Blueair models use the Blue Pure 411i Max, 411a Max SmokeBlock Filter 111237?

According to the official Blueair product page, Blue Pure 411i Max, 411a Max SmokeBlock Filter (111237) fits Blueair Blue Pure 411a Max and Blueair Blue Pure 411i Max. Verify the model label on your unit before ordering.

Do aftermarket 111237 filters work?

Marketplace listings may be from the manufacturer or a third party. Match the exact part number 111237, review the listing details, and verify the model label on your unit before buying.

Official compatibility record

Manufacturer source

Official Blueair product data identifies Blue Pure 411i Max, 411a Max SmokeBlock Filter, SKU 111237, as compatible only with Blue Pure 411i Max and Blue Pure 411a Max.

Blueair Official Blue Pure 411i Max, 411a Max SmokeBlock Filter

Source compatibility checked 2026-08-29. Recheck the listing and your purifier label before ordering.