Info: Available either in an Auto(matic) or Standard version; Includes Combination Particle/Smoke Filter & "Arctic Trail" Pre-Filter
These latest additions to our Blueair family of air purifiers offers a terrific combination of proven performance and ease of operation at a nice price point for those with mid-size to fairly large rooms. They are comparable to the Blue Pure 411 in being light and easy to move around, with a relatively small form-factor and a 360 degree air intake and a vertical output, which makes it quite flexible in where you can put it, but feature much larger capacity and performance specs. S&H included to most locations in Canada.
Info: Available either in an Auto(matic) or Standard version; Includes Combination Particle/Smoke Filter & "Arctic Trail" Pre-Filter
These latest additions to our Blueair family of air purifiers offers a terrific combination of proven performance and ease of operation at a nice price point for those with mid-size to fairly large rooms. They are comparable to the Blue Pure 411 in being light and easy to move around, with a relatively small form-factor and a 360 degree air intake and a vertical output, which makes it quite flexible in where you can put it, but feature much larger capacity and performance specs. S&H included to most locations in Canada.
Product Notes:
Wirecutter characterized the Blueair 311 Auto as having "Top performance, pleasing form" in its 2021 edition of "The 8 Best Air Purifiers"
Just like its extremely well-reviewed bigger brother the Blueair 211+, the Blue 311 or 311 Auto draws virtually all the bad stuff out of the air so you don't have to breathe it in, with a Clean Air Delivery Rate far exceeding the minimum performance thresholds recommended by experts (which is at least 118 cfm [cubic feet per minute] for the lowest measure, in a small to mid-sized room; this one's lowest measures are about twice as high as that).
They're dead simple to activate (just press the start button on top to either start it or launch it into 'Auto' mode), economical to operate, ultra-quiet on the lowest setting, and the Auto version also constantly monitors and gives a real-time indication of your room's current air-quality.
For those with 'normal' sized rooms, the Blue Pure 311 Air Purifiers really hit the sweet spot between the similarly shaped cylindrical 411 units which are better suited to smaller rooms, and the 211 and 121 models which have a much larger capacity than most actual rooms and offices need.
As with the other Blue Pure models, when they are placed in a room within its capacity ratings, the Blueair 311s are able to replace the entire volume of air every twelve minutes to make it virtually contaminant-free, plus the Auto version also has a built in air-quality sensor to enable it to turn the fan speed up or down as needed, to conserve energy (including your own). Blueair has also redesigned the reusable fabric filters from the earlier Blue series to incorporate a Velcro-style fastener on the back which can be quickly unfastened not only for the purpose of cleaning or replacing (some prefer different colours in different rooms) but also to enclose any unneeded length of the power cord.
Technical Specifications
| BLUE PURE 311 Standard | BLUE PURE 311 AUTO | |
|---|---|---|
| Room Size (based on 8 Foot ceiling) | 31.5 m2 (340 sq ft) | 36 m2 (388 sq ft) |
| Smoke CADR Ratings* | 210 cfm (374 m3 per hour) | 250 cfm (425 m3 per hour) |
| Dust CADR Ratings* | 210 cfm (357 m3 per hour) | 250 cfm (425 m3 per hour) |
| Pollen CADR Ratings* | 220 cfm (357 m3 per hour) | 244 cfm (415 m3 per hour) |
| Number of main filters included | 1 | 1 |
| Air changes per hour (ACH) | 4.8 | 4.8 |
| Dimensions (W x D x H) | 10.2 x 10.2 x 18.5 inches | 10.2 x 10.2 x 20.5 inches (25.9 x 25.9 x 52.1 cm) |
| Product weight | 6.48 lbs | 6.8 lbs |
| Energy consumption | 3-36.4 watts | 3-35 watts |
| Sound level | 23-53.5 dB(A) | 23-53 dB(A) |
| Filter replacement indicator | Yes: with a red circle on top, surrounding power button | Same |
| Air Quality Indicator | No | Yes: an LED slot on the front face, which glows either Blue, Orange, or Red. It will do so continuously on speed settings 2, 3 and Auto, or only for a few seconds after touching the power button when set to the lowest speed. |
| Speed control options | 3 Speed Levels | 3 Speed Levels or Auto mode. |
Features Common to Both:
- Casters: No
- Air outlet: Top / Air inlet: 360° around bottom
- Outer Materials: high impact plastic. (Like the original 411 model, there is no metal mesh frame around the main filter on this model, as there is in the 411+ and 211+ models.)
- Recommended filter change: 4,380 hours, which is 6 months when used 24 hours a day; or up to a year if used more intermittently
- 2 year warranty if promptly registered with Blueair, otherwise 1 year standard warranty.
(*CADR ratings according to ANSI/AHAM AC-1-2019)
Colours
The colour of the bottom half of the Blueair 311 units is determined by the outer prefilter which covers the exterior of their base. The models ship initially with a gray filter in an "Arctic Trail" tweed pattern. Several other colours are produced for this model (which are shown in this inset photo). They are sold separately, as either the: Blue Pure 311 Auto Pre-Filters, or the main Blueair Blue Pure 311 Filters.
Filter Type: The 311 Auto uses a two-in-one or combination particle and carbon filter: with the corrugated outer white part being a gradient, structured filter made with thermally bonded fibres containing polypropylene and polyethylene, which have anti-bacterial properties and resist shedding, and are free of chemicals and binders; and its inner, black part being an active carbon sheet, to help reduce odours and gaseous matter.
Together, they can remove a great deal of annoying household odours, chemicals, and gases, as well as 99.97% of airborne particles, like pollen, dust, viruses, and more. The HEPASilent technology in Blueair machines is capable of catching particles down to just 0.1 microns in size (which can included bacteria, viruses, and microplastics) in addition to removing larger particulates that aggravate allergies such pet dander, dust, pollen, and smoke.
For further information, including instructions on how to install, clean, or replace the pre-filters or air quality sensors, please download the Blueair 311 Auto User Manual [PDF]
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