# Blueair Blue Pure 511i Max

> On October 15, 2026 the lowest price for the Blueair Blue Pure 511i Max is $139 at Blueair (brand store), shipping to the United States included. In our ranking it is rank 4 of 5 for medium rooms, with a score of 7.4 out of 10.

- Page: https://bestatbest.com/us/air-purifiers/blueair-blue-pure-511i-max
- Rank 4 of 5 for medium rooms in our ranking, score 7.4 out of 10
- Today’s lowest price: $139 at Blueair (brand store), including shipping, checked on October 15, 2026
- Lowest since Oct 13: $139

## Our score

- Score 7.4 out of 10
- Lab tests, 60% of the score: no lab has tested it.
- Owners’ ratings, 25%: none yet at the stores that ship to the United States, so this part is left out and the others count for more.
- Features, 15%: 7.4, 65 of the 88 points for the facts the maker states.
- Price does not count, so a discount never lifts a model. Only robots a lab has tested are ranked.

## Prices per store

| Store | Color | Price | Delivery time | Checked |
|---|---|---|---|---|
| Blueair (brand store) | gray | $139 | 5–8 days | 20 hours ago |

## Frequently asked questions about the Blueair Blue Pure 511i Max

**What size of room is the Blueair Blue Pure 511i Max for?**

The Blueair Blue Pure 511i Max is sized for a room of about 234 ft², the room size we compare it on. Its clean air delivery rate (CADR) is 153 cfm, measured to DOE test.

**How often does the Blueair Blue Pure 511i Max need a new filter?**

The maker gives the filter a life of 9 months.

**How loud is the Blueair Blue Pure 511i Max?**

The maker states 19 dB at the lowest speed and 48 dB at the highest.

**How much power does the Blueair Blue Pure 511i Max use?**

It uses about 103 kWh a year on the maker’s test assumptions. At the highest speed it draws 17 W.

**Does the Blueair Blue Pure 511i Max make ozone?**

It is CARB certified, which means it stays under California’s limit of 50 parts per billion of ozone.

**Is the Blueair Blue Pure 511i Max good for wildfire smoke?**

Its CADR for smoke is 153 cfm. A higher number clears smoke from a room faster, so compare it with the size of your room.


## The maker: Blueair

- Owned by Unilever (https://mynewsdesk.com/blueair/pressreleases/unilever-acquires-blueair-will-help-millions-more-people-fight-rising-urban-air-pollution-by-creating-safer-indoor-environments-1520518, 2026-10-15)
- https://www.blueair.com/

Blueair was founded in 1996 in Stockholm, Sweden, and was acquired by Unilever in 2016. It sells air purifiers and filters to American buyers through its own online store. Its US privacy notice names Blueair, Inc as the company behind the store, with an address in Chicago.

https://www.blueair.com/pages/privacy-notice-us · https://www.blueair.com/ · https://mynewsdesk.com/blueair/pressreleases/unilever-acquires-blueair-will-help-millions-more-people-fight-rising-urban-air-pollution-by-creating-safer-indoor-environments-1520518

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