# Mbetter 311 Auto Replacement Filters, 2-Pack

Mbetter 311 Auto replacement filters are a two-pack listed for the Blueair Blue Pure 311 Auto air purifier. Their activated-carbon filter construction and slide-in mounting are intended for owners replacing the filter in that specific model.

- [Original product page](https://best-deals.pro/product/mbetter-311-auto-replacement-filters-2-pack)
- [View offer](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Mbetter
- Model: 311 Auto
- Category: Home & Kitchen > Appliance Parts & Accessories > Air & HVAC Filters
- Price: 36.99 USD
- Previous price: 49.99 USD
- Discount: 26%
- Price checked: 2026-11-14T06:37:36.678Z
- Rating: 4.2 / 5
- Reviews: 594

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The listing specifies compatibility with the Blueair Blue Pure 311 Auto only.
- The seller says to replace the filter within 9 months depending on actual usage.
- The product description claims particle capture down to 0.03 micrometers, but this is a manufacturer claim, not an independent measurement.

## Pros

- Two filters are listed, giving buyers a spare for a later replacement.
- Customers report that installation is easy and that the filter has no unusual smell.
- Activated carbon is listed, and the described applications include odor reduction.

## Specifications

### Identity
- Brand: Mbetter
- Model: 311 Auto
### Compatibility and installation
- Compatible air purifier model: Blueair Blue Pure 311 Auto
- Compatible device type: Air Purifier
- Mounting type: Slide In
- Shape: Rectangular
- Airflow direction: 360 Degree
### Materials and construction
- Material listed: Activated Carbon Filter
- Construction: Pleated
- MERV rating: 13
### Dimensions and installation
- Dimensions listed: 1"L x 1"W x 1"Th
- Weight listed: 1.6 pounds
### Pack details
- Number of items: 2
### Listed applications
- Common applications: Air Purification, Dust Filtration, Odor Reduction, Particle Filtration, Pet Dander Filtration, Pollen Filtration, Smoke Filtration

## Before you buy

- Compatibility is model-specific. The listing says this fits Blueair Blue Pure 311 Auto and explicitly does not fit Blueair Pure 311. Customer feedback also reports fit problems, so confirm the purifier's exact model before ordering. The listed dimensions of 1"L x 1"W x 1"Th appear inconsistent with the stated round replacement design and should not be treated as a confirmed physical size. The listing's claimed particle-capture performance and fit are not independently confirmed. The stated replacement interval is within 9 months depending on actual usage.

## In the box

- 2 replacement filters (Check selected pack): The title and listing details describe a two-pack. The included-components field says "No," so the package contents are not clearly confirmed.

## A good fit for

- Blue Pure 311 Auto owners seeking a two-filter replacement pack.
- Buyers who want a slide-in filter with activated-carbon construction.

## Less suited to

- Owners of the Blueair Pure 311 or anyone whose purifier model is not confirmed as Blue Pure 311 Auto.

## Customer feedback

Customer feedback describes the filter as easy to install and notes that it has no unusual smell. Fit and compatibility feedback is mixed, including reports that it does not fit the Blueair Pure 311, which matches the listing's warning that this is for the 311 Auto rather than the non-Auto model. Opinions on quality and value also vary. For buyers, verifying the purifier model is especially important, while the feedback does not establish uniform performance or durability.
- Positive themes: Customers describe installation as easy.
- Negative themes: Some customers report that it does not fit the Blueair Pure 311.
- Mixed feedback: Feedback on quality and value is mixed, with some customers satisfied and others dissatisfied.
- Mixed feedback: Customers' odor feedback is mixed, despite some reports of no unusual smell.

## Frequently asked questions

### Which purifier is this filter listed for?
The listing specifies the Blueair Blue Pure 311 Auto. It says the filter is not compatible with the Blueair Pure 311, so check the exact model name on your purifier.
### How many filters are in the pack?
The product title and listing details specify two filters.
### How often does the listing recommend replacing the filter?
It suggests replacement within 9 months, depending on actual usage.

## Alternative options

- [2 Pack Blue Pure 311 Auto Replacement Filter for Blueair Blue Pure 311 Auto \| 2 in 1 Fil-tration Systems, Particle and Activated Carbon](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- [211i Max Replacement Filter for BLUEAIR Blue Pure 211i Max Air Purifier \| Ture HEPA & Activated Carbon Replacement Filter, 2 Pack](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- [PuriCare 360 Filter Replacement for LG PuriCare 360 Air Purifier, AS601HBB0 \| 3-in-1 Filtration, HEPA+ Activated Carbon+Pre-Filter, for Home Large Small Room Bedroom up to 2059 ft² Air Clean, 1 Pack](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- [AP070B Replacement Filters for Aircillin AP070A & AP070B Air Purifier \| 4-in-1 High-Efficiency Air Filter with Activated Carbon, 2 Pack](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- [311i Max Replacement Filter for Blueair Blue Pure 311i Max Air Purifiers \| 2-in-1 311i Max Filter with Activated Carbon Filter, Blue Pure F3MAX, White, 2 Pack](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- [211i Max Replacement Filter Compatible with Blue Pure 211i Max Air Purifier \| 2-in-1 Air Purifier Replacement Filter, Compatible with Blueair Blue Pure 211i Max Air Purifier, White, 2 Pack](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- [Blue Pure 311 AUTO Filter Replacement for Blue Pure 311 AUTO Air Purifier \| 3-in-1 ...](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
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- [BLUEAIR Genuine 311 Auto Air Purifier Replacement Filter, Everyday \| Authentic 311 Auto Filter, The Everyday Carbon & Particle Filter for Blue Pure 311 Auto Only. HEPASilent Technology](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- [Fette Filter - 311 Air Purifier Replacement Filters, Compatible with Blueair Pure 311 High-efficiency 2-in-1 Filtration Systems, Particle Filter + Carbon Filter \(Pack of 4\)](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
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## Add-ons

- [Blue Pure Replacement Filter for Blueair 411, 411+, 411 Auto Air Purifier \| 2-IN-1 Efficient Particulate Activated Carbon 411, 411+, 411 Auto and MINI Filter for Smoke, Pet Dander, Odors, Pollen,2 Pack](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)
- [BLUEAIR Genuine 211+ Air Purifier Replacement Filter, Everyday \| Genuine 211+ Filter, The Everyday Carbon & Particle Filter for Blue Pure 211+ Only. HEPASilent Technology](https://best-deals.pro/visit/mbetter-311-auto-replacement-filters-2-pack)

## Images

![Mbetter 311 Auto Replacement Filters, 2-Pack — 1](https://best-deals.pro/i/GDKSC6VHfCj9yaj9u-qdV66OgMprHc2Fwf2DQRaTJ3QuDyYq3kcpeSWPXuoGol7o8jEMx8xRNPoTNflKSOMBZ2dAGGxwuMZVAtluhD29n3gcgm-wUCtrN1bo.jpg)

![Mbetter 311 Auto Replacement Filters, 2-Pack — 2](https://best-deals.pro/i/8ZmRXtXlvmgjgeQXQPyepGg7MGvLxdNI7Je_S260HUOCLeX_7buAYR6PFR-zTsMfXGsGpQKU_X54ajCN6d8eJjD8Uk3_4Nail0TKmUsbtkoyII1FcQN-o9cO.jpg)

![Mbetter 311 Auto Replacement Filters, 2-Pack — 3](https://best-deals.pro/i/85bup0GbRElG_RVlwMhoVXuc8VA6RL8TnQ6ioZyMjPgP8fyqRPdBkuGWFQmne1KKaua7JW5GY5dciCk9QBRP_LiNZmVvU2emORQhNQ1jaWlcJkTSH1BpTD3P.jpg)

![Mbetter 311 Auto Replacement Filters, 2-Pack — 4](https://best-deals.pro/i/DH7Lb-LBbd7LJtMRaBAZeNlZ9N-qCY_kxxluPkBAGBBDKxfQ_2Yry6cKk3z7j4msIL2akn1bHHsV8SnBKNa9-lzUUK9o22quCD2Dm1VUM6njH5qXSUFVJTJl.jpg)

![Mbetter 311 Auto Replacement Filters, 2-Pack — 5](https://best-deals.pro/i/0mOqXHqwy0tFLR2n2NG1hEdhMnP5R5-l3cnY0TlbImOzrMHWfNOK-dSNre9c1n6WZnunNIV-gCUzfB9u8SbUogEibLtu99asc0kQMlzP0uMVZSmuZoC6xqWv.jpg)