Mbetter AllergenBlock Replacement Filter for Blue Pure 411i Max and 411a Max

Mbetter’s AllergenBlock replacement filter is listed for Blue Pure 411i Max and 411a Max air purifiers. The listing describes an activated-carbon filter and recommends replacement within nine months based on actual usage. Confirm your purifier model before ordering because older 411, 411+ and 411 Auto models are specifically excluded.

At a glance

Listed as compatible with Blue Pure 411i Max and 411a Max air purifiers.
The listing identifies activated carbon as the filter material and describes a honeycomb carbon structure for odor adsorption.
The manufacturer claims particle-trapping performance, but its stated figures are not independently verified.

Price

$38.24Save 15%

Reference price: ~~$44.99~~

Price checked: Nov 14, 2026

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Often bought together

Mbetter 2 Pack 211i Max AllergenBlock Filters for Blue Pure 211i Max | Air Puri-fier, Activated Carbon Filters, Replacement Part #F2MAX

$52.24

Mbetter 2 Pack 311i Max AllergenBlock Filters for Blue Pure 311i Max | Air Puri-fier, Activated Carbon Filters, Replacement Part #F3MAX

$45.04

Pros and cons

Pros

Disposable replacement avoids the need to wash or reuse the filter.
The listing describes carbon media intended to help adsorb odors, including kitchen grease smells and second-hand smoke.

Technical specifications

6 specifications

Identity
Brand	Mbetter
Model	411i Max & 411a Max AllergenBlock Filter

Dimensions and installation
Dimensions listed	13.9"L x 9.8"W x 4.1"H

Materials and protection
Material listed	Activated Carbon Filter

Use and maintenance
Reusability	Disposable
Recommended replacement interval	For the ongoing top performance of your Blue Pure 411i Max & 411a Max Air Puri-fier, based on actual usage the filter should be replaced within 9 months

What to know before buying

Listing details to confirm

Compatibility is stated for the 411i Max and 411a Max, while an A+ note says only 411i Max. The product title and bullets also name both models, so confirm compatibility with the selected listing and your purifier. The listing says it does not fit 411, 411+ or 411 Auto models. Performance figures are manufacturer claims, not verified results. Replacement is advised within nine months depending on actual usage.

What’s in the box

Included

Who is it for?

A good fit for

Owners of a Blue Pure 411i Max or 411a Max looking for a disposable replacement filter with activated-carbon material.
Buyers who want a filter listing that gives a usage-dependent replacement interval and describes odor adsorption.

Less suited to

Owners of Blueair 411, 411+ or 411 Auto models, which the listing says are incompatible.
Anyone seeking a washable or reusable filter.

Mbetter AllergenBlock Replacement Filter for Blue Pure 411i Max and 411a Max · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.9 / 5 · 20 ratings

5 stars93%93%
4 stars7%7%
3 stars0%0%
2 stars0%0%
1 star0%0%

Aggregate ratings are strongly positive, but the available evidence contains no written customer feedback. Ratings alone cannot establish fit, odor control or filter performance, so confirm compatibility for your exact purifier model before relying on the listing's claims.

Frequently asked questions

Which air purifiers is this filter listed for?

The title and product bullets identify Blue Pure 411i Max and 411a Max. An A+ note specifies only the 411i Max, so verify the selected listing if you have a 411a Max.

Does it fit the Blueair 411 or 411+?

No. The listing specifically says it is not compatible with the 411, 411+ or 411 Auto air purifiers.

How often should the filter be replaced?

The listing advises replacing it within nine months based on actual usage.

Is this filter reusable?

It is listed as disposable.