The Blueair Blue Pure 411i Max (or Blueair Blue Max 3250i, if you hail from the UK) has sat at the top of TechRadar’s best air purifier ranking for nearly a full year now. We’ve tested plenty more purifiers since – including powerful machines that are excellent at clearing odors and purifiers that double up as side-tables – but none quite match this Blueair machine’s blend of user-friendliness, efficient cleaning and value for money.
It’s impressively compact and lightweight given its capabilities, and straightforward to control, too. On top you’ll find a touchscreen button to switch the purifier on and off, and another to cycle through the modes: three fan speeds, an Auto mode and a Night mode. That’s enough options to give you a good amount of control, but no extras to overcomplicate things.
Wrapped around the outside is your fabric pre-filter, which Blueair has cleverly made available in a range of colors to suit your decor. Our tester was especially impressed that it was removable and machine-washable. The pre-filter is your first line of defense, and inside the purifier you’ll find a secondary filter for finer particles, plus an activated carbon filter to tackle bad smells. These will need to be replaced periodically, but the pricing for replacement filters is reasonable.
In Auto mode, the purifier will detect PM2.5 particles, and increase its fan speed to clear them. In fact, it’s capable of filtering other particle types too – including VOCs – but it won’t detect them and respond to them in Auto mode. (There are options with more sensitive Auto modes listed in the alternatives section below if you’d prefer.)
Our tester found this purifier reliably detected contaminants and cleared them quickly – you can read about the tests in more detail in our Blueair Blue Pure 411i Max / Blue Max 3250i review. She was also impressed with how quietly it operated.
This is all the more impressive given how much it costs. At full price, the Blueair Blue Pure 411i Max / Blue Max 3250i is $169.99 / £169, but we’ve spotted multiple discounts over the past few months. And with the early Black Friday sales starting to ramp up, now could be an especially good time to buy.
There’s 20% off the UK version of this purifier in the run-up to Black Friday, taking the price down to £135. That’s far cheaper than it usually is, although not quite the lowest price I’ve seen. View Deal
Not right for you? Try these instead…
If the Blue Pure 411i Max / Blue Max 3250i doesn’t fit the bill for you, here are three alternatives.
The TP09 is a more advanced air purifier, both in terms of what it can detect and clear, and the amount of information it provides. There’s a screen on the front of the machine that provides at-a-glance air quality data, and a companion app where you can dig in further.
Read more in our Dyson Purifier Cool Formaldehyde TP09 review
The Blue Signature is a more advanced purifier, designed for larger rooms. It hooks up to a companion app, which offers air quality data for you to dig into, and the design is meant to blend seamlessly into your decor, and you can add a topper that turns it into a side table.
Read more in our Blueair Blue Signature review
The Levoit EverestAir isn’t as nice to look at as some of the other options here, but it’s extremely powerful and especially efficient at clearing odors. The straight-sided design means it can be positioned flush to a wall, out of the way. There’s a companion app offering plenty of setting options and data.
Read our full Levoit EverestAir air purifier review
