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Replacement filters can look nearly identical online, but buying the wrong version can mean poor fit or wasted money. The Mixzeny 211+ Auto Replacement Filter is an aftermarket 2-pack made for the Blueair Blue Pure 211+ Auto, with pleated particle media and an activated-carbon layer. It is a practical option if you want two replacement filters in one purchase, but you should know that it is not a genuine Blueair filter. This review explains the fit, filtration claims, installation, replacement schedule, and the main tradeoff between aftermarket value and manufacturer-backed filtration.
Quick Verdict
Rating: Recommended with caveats
Best For: Blue Pure 211+ Auto owners who want a two-filter aftermarket replacement pack.
Bottom Line: You get two filters, seller-listed True HEPA particle filtration, and activated carbon for odor control. The main tradeoff is that this is a third-party filter, so buyers who want genuine Blueair filtration and manufacturer-backed performance should choose an official replacement instead.
Key Specifications
| Specification | Detail |
|---|---|
| Brand | Mixzeny |
| Model | 211+ |
| Product type | Aftermarket air-purifier replacement filter |
| Pack quantity | 2 replacement filters |
| Filter design | Pleated particle filtration with activated carbon |
| Filtration claim | Seller markets the filter as True HEPA and states 99.97% filtration of airborne particles at 0.3 microns |
| Listed dimensions | Approximately 11.7 × 11.7 inches across the filter face |
| Compatibility | Blueair Blue Pure 211+ Auto |
| Replacement guidance | About every 6–8 months, depending on use and environment |
| Important note | Third-party replacement, not a genuine Blueair filter |
What Is the Mixzeny 211+ Auto Replacement Filter?
The Mixzeny 211+ Auto Replacement Filter is a third-party replacement made to fit the Blueair Blue Pure 211+ Auto air purifier. The package contains two filters, which can be convenient if you want to keep the next replacement on hand instead of ordering one filter at a time.
Its filtration design combines pleated particle media with activated carbon. The seller describes the particle layer as True HEPA and states that it captures 99.97% of airborne particles at 0.3 microns, including particles associated with dust, pollen, pet dander, and smoke. The activated-carbon section is intended to help with household odors.
The important distinction is that this is not Blueair’s genuine Particle + Carbon filter. Blueair describes its own filtration system as HEPASilent, which combines mechanical and electrostatic filtration. You should therefore treat the performance claims for this aftermarket filter separately from Blueair’s published performance figures for its genuine filter.
Before You Buy: Confirm that your purifier is the Blue Pure 211+ Auto, not the standard Blue Pure 211+. On the Auto model, the main control button is located on top. The standard 211+ has its control on the front. Similar model names make this an easy buying mistake.
Who Should Buy It?
Best For
- Blue Pure 211+ Auto owners who want a compatible aftermarket filter.
- Homes with pets, pollen, dust, or light household odors to filter.
- Buyers who prefer having two replacement filters in one package.
Skip If
- You own the standard Blue Pure 211+ rather than the 211+ Auto.
- You specifically want a genuine Blueair replacement filter.
- You want performance backed by Blueair’s published genuine-filter testing.
Particle and Carbon Filtration
The pleated main filter provides a large filtration surface within a compact space. As your purifier pulls air through the media, airborne particles are trapped in the filter instead of continuing to circulate through the room.
The seller markets this Mixzeny filter as True HEPA and states a 99.97% filtration rate at 0.3 microns. That claim is useful when comparing the listing with other aftermarket filters, but it should be understood as a manufacturer or seller claim rather than independent testing performed for this review.
The activated-carbon layer serves a different purpose. It is intended to trap light household odors associated with cooking, pets, and smoke. Carbon filtration can complement particle filtration, but you should not expect a replacement filter alone to solve the source of strong or persistent indoor odors.
Fit and Compatibility
Compatibility is the most important buying factor here. This filter is listed for the Blueair Blue Pure 211+ Auto. The similar-looking Blue Pure 211+ uses a different replacement-filter configuration, so checking the exact purifier model before ordering matters more than relying on the general “211+” name.
If the control button on your purifier is positioned on top, that is a useful visual clue for the 211+ Auto model. You can also check the model label on the purifier before ordering. A correct fit helps keep air moving through the filter instead of around gaps at the edges.
Pro Tip: Take a photo of your purifier’s model label before ordering replacement filters. It gives you an easy reference when comparing nearly identical Blue Pure 211+ and 211+ Auto listings.
Easy Installation: Step-by-Step Guide
You do not need special tools for a normal filter change. Before starting, turn the purifier off and unplug it. Follow the purifier’s manual when opening the unit and removing the existing main filter.
- Unplug the purifier. Do not work inside the unit while it is connected to power.
- Open the purifier according to the Blue Pure 211+ Auto instructions.
- Remove the used main filter carefully. Avoid shaking accumulated dust back into the room.
- Fit the new filter into the same position. Check that it sits evenly and does not leave obvious gaps.
- Reassemble the purifier before reconnecting it to power.
- Reset the filter reminder if needed. Follow the Blueair instructions for your purifier’s filter indicator.
After a filter change, Blueair’s current guidance says the replacement indicator can be reset by pressing and holding the center button until the red filter light disappears. Follow the instructions supplied with your exact purifier because controls can vary between models.
When to Replace Your 211+ Auto Filter
The product listing recommends replacing this filter every 6 to 8 months, with the actual interval depending on usage and the surrounding environment. A purifier running for many hours each day in a dusty home may load its filter faster than one used occasionally in a cleaner room.
Your purifier’s filter reminder is the easiest starting point. You should also pay attention to obvious filter loading, persistent dust buildup, or reduced airflow. Do not wait indefinitely simply because the filter still looks usable from the outside.
Buying a 2-pack makes the replacement schedule easier to manage because one spare can remain ready for the next change. Store the unused filter in a clean, dry place until you need it.
How It Performs in Real Use
For Homes With Pets
The particle-filtering media is intended to capture airborne pet dander along with ordinary household dust. The activated-carbon layer may also help with light pet-related odors. You will still need normal cleaning because an air purifier cannot remove pet hair and settled debris from floors or furniture.
During Pollen Season
Pollen is one of the particle types listed for the filter. Running your Blue Pure 211+ Auto consistently can help move room air through the replacement media, but the filter should be viewed as part of indoor-air management rather than a treatment for allergies or other medical conditions.
For Cooking and Light Household Odors
The carbon layer gives this filter an advantage over plain particle-only media when odors are part of your concern. It is better suited to routine household smells than to solving heavy smoke, major chemical fumes, or an ongoing ventilation problem.
For Long-Term Maintenance
The main convenience is the two-filter package. With a suggested 6 to 8 month change interval, a 2-pack can cover more than one replacement cycle in typical use. Your actual replacement schedule should follow filter condition, purifier reminders, and the environment in your home.
Maintenance and Usage Tips
Keep the outside pre-filter and purifier surfaces maintained according to the Blueair manual so large dust and hair do not accumulate unnecessarily. Do not block the purifier’s air intake or outlet, and leave enough space around the unit for normal airflow.
The product information for this ASIN describes scheduled replacement rather than washing and reusing the main filter. Unless the instructions included with your filter explicitly say otherwise, do not soak or wash the replacement media. Moisture can damage filter materials and can create problems when the filter is placed back inside an electrical appliance.
When handling a fresh filter, keep it clean until installation and avoid crushing or deforming the pleated media. A filter that does not sit correctly can interfere with proper airflow through the purifier.
Compatibility and Safety
This replacement filter itself is not an electrical component, but you install it inside a powered appliance. Always unplug the Blue Pure 211+ Auto before opening the purifier or changing the filter.
Blueair recommends genuine Blueair filters for its purifier system. If maintaining manufacturer-backed filtration performance or warranty coverage is a priority, review the terms for your purifier before choosing a third-party filter.
Do not treat air filtration as medical treatment or as a substitute for fixing mold, smoke sources, unsafe fumes, or inadequate ventilation. If you have a health concern related to indoor air, follow appropriate professional guidance.
Pros and Cons
Pros
- Two replacement filters are included in one package.
- Designed specifically for Blue Pure 211+ Auto fit.
- Pleated particle-filter design increases filtration surface area.
- Activated carbon adds light household-odor filtration.
- Installation does not require special tools.
Cons
- It is not a genuine Blueair replacement filter.
- Compatibility is limited to the Blue Pure 211+ Auto, not every 211-series purifier.
- Seller-listed filtration claims are not the same as Blueair’s manufacturer-backed performance testing for its genuine filter.
Is It Worth the Price?
The value proposition comes mainly from the 2-pack format. Instead of buying a single replacement each time your purifier reaches its filter-change interval, you can keep the second filter ready for the next cycle.
That makes this Mixzeny option worth considering if you specifically want an aftermarket replacement and care about getting two filters in one purchase. The tradeoff is the lack of the same manufacturer-backed performance assurance that comes with an official Blueair filter.
If your priority is lower replacement cost per filter or convenient spare-filter storage, the 2-pack format can make sense. If genuine components, Blueair’s tested filtration system, and manufacturer guidance matter more to you, the official filter is the more conservative choice.
How It Compares to Alternatives
The most direct alternative is Blueair’s genuine Blue Pure 211+ Auto Particle + Carbon replacement filter. Blueair’s own filter is designed around the purifier’s HEPASilent system and carries the advantage of manufacturer-backed compatibility and performance information.
Blueair also offers other filter variants within its 211+ filter range for buyers focused more heavily on allergens or smoke. Before choosing any alternative, verify that the exact filter is listed for your Blue Pure 211+ Auto rather than assuming every 211-series filter is interchangeable.
What to Do if the Filter Does Not Fit
First, recheck the purifier model label. The Blue Pure 211+ and Blue Pure 211+ Auto have similar names but use different filter configurations. The control-button position can also help you distinguish the Auto version from the standard model.
If you confirmed the correct model but the replacement still does not sit properly, do not force it into place. Review the installation instructions and contact the marketplace seller about the aftermarket filter. For questions about the purifier itself, use Blueair’s official support resources or the user manual.
Frequently Asked Questions
Is this a genuine Blueair 211+ Auto filter?
No. ASIN B0BKPL27DW is an aftermarket Mixzeny replacement filter made to be compatible with the Blueair Blue Pure 211+ Auto. Blueair sells its own genuine replacement filter separately.
Does it fit the regular Blue Pure 211+?
The listing specifies the Blue Pure 211+ Auto. Do not assume it fits the standard Blue Pure 211+. Check your purifier’s model label before ordering.
How can I tell whether I have the 211+ Auto?
Check the model label on your purifier. As a quick visual clue, the Blue Pure 211+ Auto has its main control button on top, while the standard Blue Pure 211+ has the control positioned on the front.
How often should you replace the Mixzeny 211+ Auto filter?
The listing recommends replacement about every 6 to 8 months. Heavy daily use, pets, dust, smoke, and other environmental conditions can affect how quickly a filter loads.
Is this really a HEPA filter?
The Mixzeny product listing markets the replacement media as True HEPA and states 99.97% filtration at 0.3 microns. That is a seller-listed claim for this aftermarket product. Blueair’s own genuine filter uses a different system that Blueair calls HEPASilent.
Can you wash and reuse this replacement filter?
The product information located for this ASIN describes scheduled filter replacement and does not provide a washable-main-filter claim. Do not wash the filter unless the instructions included with your specific package explicitly say it is safe to do so.
What does the activated-carbon layer do?
The activated-carbon layer is intended to help trap light household odors associated with pets, cooking, and smoke. It complements the particle-filtering media, but it should not be expected to correct a serious indoor pollution or ventilation problem by itself.
The Bottom Line
The Mixzeny 211+ Auto Replacement Filter makes the most sense if you own a Blue Pure 211+ Auto and want a two-pack of compatible aftermarket filters with particle and activated-carbon filtration. Its main advantages are the 2-pack format and straightforward replacement, while its biggest limitation is that it is not a genuine Blueair filter. Skip it if manufacturer-backed filtration performance and genuine Blueair components are more important to you than aftermarket value.
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