Blueair Blue Pure 121 Auto Air Purifier | Maintenance, Customisations, and More





The Blueair Blue Pure 121 Auto is the largest machine in Blueair’s “Blue” series. This air purifier is designed for extra-large rooms. If you’re looking for an air purifier for rooms that are smaller than 600 square feet, then you will want to look at the smaller Blueair units.

These smaller Blue-series air purifiers include the Blue Pure 211 (designed for rooms that are about 540 square feet), the Blue Pure 311 (for areas around 388 square feet), and the Blue Pure 411 (about 150 square foot rooms). We’ve got short posts on all of those units that might be worth looking at if they sound like better fits to you.

Once again, the Blueair Blue Pure 121 Auto is the largest air purifier in the “Blue” collection of air cleaners from Blueair. It’s for oversized rooms that are between 600 and 700 square feet.

What is There to Know About the Blueair Blue Pure 121 Auto?

Blueair Blue Pure 121 Auto Air Purifier with HEPA filter, Activated Carbon filter, prefilter

The Blueair Blue Pure 121 is built to clean the air in the largest of rooms that you’ll have. For those of use with multiple adjoining rooms (for instance, a kitchen, dining room, and living room that don’t have any doors between them), this air purifier could be the perfect match for you. If the area you’re hoping to have your air purifier clean the air in is between 600 and 700 square feet, that’ll be where this air purifier works best.

The 121 utilizes three different filter types to give you the cleanest possible air. These three filters include a HEPA filter, an electrostatic plate, and an activated carbon filter. These three filters can kill germs, remove allergens, and get rid of unwanted odors and smoke.

Like the other air purifiers in Blueair’s “Blue” series, this air purifier also has a pre-filter (which we didn’t count in the original count of three). This fourth filter does do a bit to clean your air, but it’s main purpose is to extend the life of your main filter, which can be expensive. Pre-filters are a must for anyone who doesn’t want to constantly replace their main filter.

Were Can I Get Replacement Filters for the Blueair Blue Pure 121 Auto

As with the other three popular sizes for these air purifiers, the replacement filters are super easy to get a hold of for the 121. Below we have a button you can hit to order it online.

The replacement filter is the big boxy one and that big old box houses both your HEPA filter and activated carbon one. It’s a single unit that has both things in it. You will end up replacing this once every six months if you run it all day every day.

Where Can I Get a Different Color Pre-Filter for My Blueair Blue Pure 121 Auto?

Getting tired of the same old color pre-filter that your air purifier came with? Did it get a hole? Or are you just in the mood to find a backup? Whatever you’re thinking, we’ve got some great news. You’ve got five different colors to choose from!

Your color options include: diva blue, buff yellow, crystal pink, lunar rock, and dark shadow.

And, before you go on to make a purchase, I’d like to remind you that the fabric pre-filter is machine washable. You don’t have to buy a new one if it’s dirty, just give it a wash.

Closing Thoughts on the Blueair Blue Pure 121 Auto

Something we’ve loved about the Blueair Blue series is that you have so many options. Rather than get a random air purifier that you’re not too fond of, you can get one that takes care of everything you need. You can get the same quality of air no matter what size room you have.

On top of that, you’ve got the ability to customize the color of your Blueair Blue Pure 121 Auto. Not a lot of companies give you such a variety in color, so your options with this one are super cool.

So, if you’re looking for an air purifier for a large (600-700 square foot) room, then this is the unit for you!

Frequently Asked Questions

Do I Have to Replace a Blueair Blue 121 Auto’s Pre-Filter?

No, the fabric pre-filters are machine washable. We find that washing them once every two weeks usually does the trick. That being said, the main filter will have to be replaced about once every six months.

What Color Pre-Filters are there for a Blueair Blue Pure 121 Auto?

There are five color options for the Blueair Blue Pure 121 Auto. These colors include: diva blue, buff yellow, crystal pink, lunar rock, and dark shadow.

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Kaela Stone

Kaela is one of Air Purifier Essential's key contributors. She has been using air purifiers for her whole life and can't imagine life without one.

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