I welcomed this Blueair for extra-large rooms into my home, and it’s the most attractive air purifier I’ve ever seen

Blueair Blue Signature: two-minute review

The Blueair Blue Signature is a furniture-inspired air purifier for extra-large rooms, available from Blueair, Amazon, and other third-party retailers.

You can purchase the Blueair Blue Signature for a list price of $449.99 / £369, but it’s worth keeping an eye out for discounts to maximize the value. I’ve not spotted any in the UK so far, but at the time of writing, US customers can get a $50 discount at Blueair, bringing the price down to an even more reasonable $399.99.

While the mid-gray Light model is more to my preference, the navy blue Dark model I’ve been testing does a great job of blending into the room, rather than standing out like other white plastic air purifiers often do.

Like many of Blueair’s purifiers, the Blue Signature features an easy-to-clean fabric pre-filter, which is available in a range of colors to help it blend in with your decor.

At 15.5 inches / 39.4cm in diameter, there’s plenty of room to plonk down the remote or a magazine, but as I learned from my experience, you’ll need to be mindful about placing anything that could scratch the tabletop.

The Blue Signature is satisfyingly lightweight considering its size, making it easy to unbox and set up. I found it to be a little low for my liking, but this may well be down to personal preference.

There are two bases that can be purchased separately, a chrome ring or some wooden legs, that’ll increase its height and enhance its furniture-style aesthetic. Their prices are a hard pill to swallow, however, at a cost of $99.99 / £99.99 and $79.99 / £79.99, respectively.

The motion-activated controls on the top of the Blue Signature are responsive and easy to use, and remote controlling the purifier is straightforward on the well-designed Blueair app.

The app contains a host of useful features, including controls, automations, settings, and color-coded air quality graphs for up to a month of PM1, PM2.5, and PM10 readings.

In addition to the four fan speeds, there are three modes available. These are Auto mode, which sets the Blue Signature to purify at speed one until contamination is detected, Eco mode, which operates the same as Auto, but the purifier remains idle, and Night mode, which lowers the purifier to its lowest speed and turns off most of the lights.

There’s a useful AirSense automation that provides a quick freshen up twice a day when the Blue Signature is in Auto or Eco mode, which runs regardless of the ambient air quality, though it can be turned off if desired.

In terms of performance, I was very pleased with the Blue Signature’s efforts. It promptly detected and cleared the contamination caused as a result of my spraying dry shampoo from a couple of feet away, and displayed the readings in the graphs on the app.

It appears that the Blue Signature does a better job of tackling odors than other purifiers I’ve tested, as it made short work of removing the fragrance from the dry shampoo following my testing.

The Blue Signature operates satisfyingly quietly despite its power, maxing out at just 55dB at top speed, and giving readings as low as 27dB on speed one, which is quieter than a whisper.

As the brand makes some of the best air purifiers, it hasn’t come as a surprise that there’s so much to love about the Blueair Blue Signature. It has many useful features and performs well at a pleasingly low volume for the price, making it the perfect choice for larger spaces, without being conspicuous.

Blueair Blue Signature review: price & availability

• List price: $449.99 / £369
• Launch date: Mid 2025
• Available now in the US and UK

The Blueair Blue Signature has a list price of $449.99 / £369, and is available to purchase directly from Blueair or at Amazon.

This is a pretty good price considering it’s designed for large rooms, supports WiFi connectivity, and can detect and react to PM1, PM2.5, and PM10, meaning it’ll jump into action whether ultra-fine or coarse particles are present.

What’s more, I’m already seeing some great deals appearing in the US, with Blueair offering a $50 off the price at the time of writing, so you can pick the Blue Signature up for just $399.99. I’m yet to spot a deal in the UK just yet, but you never know.

Blue Signature 4.0 replacement filters look a little pricey at $99.99 / £99.99 each, but Blueair states that these filters can last up to a year, and their RealTrack algorithm calculates the lifetime left on your filter based on the fan speed, usage time, and pollution levels, meaning it should offer a more accurate expiry date compared to other models.

It’s worth noting that while the all-singing-all-dancing 7-stage filter uses Blueair’s HEPASilent technology, it’s not a true HEPA filter, though Blueair has insisted that their filters are actually more effective and operate at lower volumes.

I tested the Blueair Blue Signature without any accessories, but there’s the option of two different stand formats if you want to make it look more like a piece of furniture.

These don’t come cheap, however, with the wooden legs, referred to as the Leg Base in Wood, costing $79.99 / £79.99, and the Ring Base in Chrome costing an eye-watering $99.99 / £99.99. As nice an addition as these would make, I must admit that I consider these grossly overpriced, which is a shame, as they would greatly improve the aesthetic.

Accessories aside, considering the Blue Signature’s reliable performance, easy filter replacement, and simple controls, this Blueair purifier offers plenty of bang for your buck, even at the full list price, making it well worth your consideration.

• Value score: 4.5 out of 5

Blueair Blue Signature review: specs

Blueair Blue Signature review: design and features

• Pleasantly lightweight for the size
• Four fan speeds, three purifying modes
• The material of the tabletop surface could be better

The furniture-inspired design of the Blueair Blue Signature makes it pleasingly subtle for an extra-large room air purifier.

The Blue Signature comes in a choice of Light and Dark models, the former being a mid-gray color, and the latter being a navy blue, which is the model I’ve tested.

Both models come with a color-coordinated machine-washable pre-filter, a Nordic Fog with the Light, and a Midnight for the dark. At the time of writing, the Blue Signature Light model doesn’t appear to be available at Blueair in the UK, but it can be purchased from Amazon.

If you feel like mixing things up, there are four other pre-filter colors to choose from, which include a couple of neutral colors, a blue, and a green. Each pre-filter has a list price of $24.99 / £24.99, so it’s not too much of an outlay if you want to change up the color, or have a spare to put on while the other is in the wash.

Although rather large, at 15.5 inches / 39.4cm in diameter, the Blue Signature is surprisingly easy to maneuver, as it weighs only 13.2lb / 6kg, and I could use the gap between the pre-filter and the top section to carry it about.

The Blue Signature’s 17.2 inches / 43.7cm height might prove a little low to use as a side table for some, but it’s not inconveniently short. The wooden legs would definitely prove beneficial here, but I think I’d rather prop it up on something than pay that price for the four-legged base.

The smooth matte plastic on the top of the air purifier makes it look like what it is, the top of an appliance, rather than an item of furniture. I would have liked to have seen a slightly more premium finish, but it offers plenty of surface area for placing mugs, books, and remote controls.

Speaking of controls, the touch controls on the top of the Blue Signature are pretty nifty, as the motion-activation means they disappear along with the display. They’re pleasingly simple to use, and include buttons for power, Auto mode, night mode, a display lock, and cycling through the four fan speeds. It’s quick and easy to change the settings on the app, too, so I could switch modes without needing to move out of my comfy spot on the sofa.

There’s a steady blue light under the top surface of the air purifier when the air quality is rated as excellent. It changes color depending on the level of contamination, and is automatically dimmed when the Blue Signature is put into Night mode.

When Auto mode is enabled, the Blue Signature fan runs at speed one consistently, increasing the speed to suit whenever the Blue Signature detects PM1, PM2.5, or PM10 contamination.

I appreciate that the air purifier continues to purify at a low speed despite the air quality registering at a good level, as many air purifiers simply idle on Auto mode, so they fail to react and purify the surrounding air of contaminants they aren’t capable of detecting, such as VOCs.

Lastly, there’s an Eco mode, which works much the same as Auto mode, except it sits dormant until contamination is detected, thereby conserving energy.

• Design & features score: 4.5 out of 5

Blueair Blue Signature review: app

• Quick and easy device syncing
• Simple and straightforward interface
• Provides access to air quality graphs, settings, and automations

Adding a new device can be a headache in some cases, but as the Blueair app detected the Blue Signature straight away, I simply needed to select it and follow the instructions to connect it to my WiFi, which it did with no issues.

The Blueair app is simple to navigate, and the settings are easy to access and adjust on the dashboard for the Blue Signature. For day-to-day control, there’s a simple slider to amend the fan speed, buttons to enable each of the three modes, and the display lock function.

There’s a useful feature linked to the Auto and Eco modes called AirSense, which means that my air purifier would stir into action for ten minutes at 10am and 6pm every day, though it can run for as long as twenty-five minutes if the air quality is a little lower.

This is particularly helpful if you plan to keep your air purifier set to Eco mode, as the air will still get a little freshen up twice a day. If you’d rather it didn’t embark on these mini cleaning sprees, it’s easy to turn off in the device settings.

There’s also a schedule feature, which can be used to set the air purifier to power on in a chosen mode at set times on your choice of days, before turning off at an allotted time.

Another nifty automation is the Welcome Home feature, which powers on the Blue Signature when you’re approximately fifteen minutes away from home, based on your location and specified transport method.

A color-coded graph makes it easy to review the collected air quality data on the Blueair app. There’s a different graph for PM1, PM2.5, and PM10, with the option to view the readings over the course of a day, week, or month.

Overall, the app provides all the essentials in an easy-to-navigate interface, and all functions appeared responsive, bar the few moments it can take for the graph to update and reflect the real-time air quality readings.

• App score: 4.5 out of 5

Blueair Blue Signature review: performance

• Quick and easy setup
• Prompt detection and contamination clearing
• The dark tabletop appears to scratch easily

Getting the Blueair Blue Signature setup was a quick and simple process, as it was just a case of plugging it in and setting it up on the Blueair app.

I didn’t feel quite as comfortable using the Blue Signature as a side table as I did with the SwitchBot Air Purifier Table, as it felt a bit wrong putting things down directly on top of an air purifier, and the material looks like it’d mark and scratch easily.

While the dark blue table top collected fingerprints easily, they wiped off without much effort. This was a relief, as some darker-colored matte surfaces can prove notoriously difficult to remove fingerprints from.

Sadly, it got a bit scratched not long into my testing. Presumably, this was from me balancing the plug on it as I pulled it out of the box, though it was only the plastic part of the plug in contact with the surface, which is a concern considering it’s meant to be used as a tabletop.

These scratches were only really visible when caught in the light however, and likely more noticeable due to the dark coloring of the plastic. Either way, I’d definitely recommend enforcing the coaster rule in your house if you plan to use it as a table.

All of the modes worked as expected. Night mode reduced the fan to its lowest speed and extinguished the indicator light, the display, and most of the touch controls, though curiously, the Night mode and power button remain illuminated.

In terms of purifying performance, I was pleased to find that the Blue Signature only took around sixteen seconds to detect the dry shampoo I’d sprayed around two feet away.

After detecting the contamination, the air quality rating was updated to “very polluted”, and so the Blue Signature ramped up the fan speed. The air quality returned to “good” levels around twenty seconds from detection, and was back to “excellent” after a further minute, at which point the fan speed was reduced back to its lowest setting.

The Blue Signature appeared to clear odors better than other air purifiers I’ve tested. While the strong smell of the dry shampoo usually lingers long after the air purifier I’m testing has dealt with the particulate contamination, it was cleared fairly quickly by the Blue Signature.

This may well be down to the fact that the Blue Signature runs at its lowest fan speed in Auto mode, rather than simply idling, meaning it could prove a good option if reducing ambient odors is on your list of priorities.

I was impressed by the Blue Signature’s low volume too, finding that it operated quieter overall than the majority of the air purifiers I’ve tested to date. The loudest reading I recorded was 55dB when it was running at top speed, making it no louder than a conversation, and it operated at just 27dB on fan speed one, which is quieter than a whisper.

While the tabletop may leave a little to be desired, all in all, the Blueair Blue Signature performed really well. Its capacity to purify an extra-large room's worth of air, in-app features, quick detection, and contamination tackling make this a great air purifier for the price, and, ignoring my personal preferences on its suitability as a table, it looks a whole lot more attractive than any large-scale air purifier I’ve come across to date.

• Performance score: 4.5 out of 5

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Blueair Blue Signature review: Also consider

How I tested the Blueair Blue Signature

• I tested the Blueair Blue Signature over a few weeks
• I explored the Blueair app and tested the modes and features
• I tested the purifier's detection and reaction speeds

After assembling the Blueair Blue Signature and syncing it to the Blueair app, I tried out the onboard touch controls and app-based controls before having a good explore of the different settings and features.

Along with using the Blueair Blue Signature passively in my home, I also conducted our standard testing procedure of spraying dry shampoo from around two feet away to assess its performance. I then assessed the air quality readings on the app to ensure they were aligned.

I measured the sound levels emitted from different fan speeds and modes, and compared these readings to the measurements I’ve taken from other air purifiers.

• First reviewed: October 2025
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