Compact yet powerful. One-button operation. 360 degrees of advanced, ultra-quiet filtration. Just plug this powerful performer in, and let the good air flow. Cleaning the air has never been this easy.
Filters the air in a 340 ft² space in about 12.5 min¹ (4.8x an hour, based on AHAM recommended removal rate) or up to 1,632ft² in one hour on high speed to effectively lower particle levels and maintain a comfortable environment in medium spaces like primary bedrooms and playrooms.
An outer fabric washable pre-filter starts the process by removing larger particles. This also extends the life of the main filter.
The main particle filter removes everything from pollen, dust and pet dander to viruses and bacteria.
Then a layer of activated carbon goes to work, ridding households of light odors from pets, cooking and smoking.
Only Blueair air purifiers use HEPASilent™ dual filtration technology, delivering maximum filtration with minimum noise. This dual filtration technology pioneered by Blueair combines electrostatic charging of particles and mechanical filtration along with a unique filter designed to produce more² clean air, cleaning your air much faster and more quietly³ than traditional HEPA filtration alone.
With just one button to press and keep an eye on for filter status, you'll never be fussing with settings or left wondering about air quality.
Easily customize your air purifier to sleekly blend into any space with up to five washable pre-filter fabric colors. Scandanavian inspired Arctic Trail is included.
A 360-degree air intake means you can place the 311 almost anywhere without compromising performance. Combine this with its compact and lightweight design, and you have an air purifier that is easy to move and place wherever suits you.
can sleep on
Get clean air while you work or sleep without disruption. Operates at noise-levels that are a whisper quiet 23 dB on its lowest speed, and no louder than a 53 dB rainfall on its highest setting.
ENERGY STAR rated for best-in-class efficiency. This certified air purifier uses less energy (3W) than the average LED lightbulb (about 10W) so it’s kind to your wallet and the planet. Confidently run it for quality air 24/7.
While the colorful fabric of the pre-filter looks great, it also extends the life of its primary filter by catching large particles. Its fabric can be vacuumed or put in a washing machine for cleaning.
An AQI, or air quality indicator, uses an LED to display colors for good, moderate, or poor based on the amount of fine, PM2.5, particles an integrated particle sensor finds in your space.
Never worry about your filter's quality with a built-in LED warning system that glows red when you are due for a refresh. For optimal performance, we recommend replacing filters every 6 months.
With just one button to press and keep an eye on for filter status, you'll never be fussing with settings or wondering about air quality.
Interact with your air purifier and it brightens up for easy reading, then after aprox. 7 seconds, the LED light will automatically return to a calming 10% level of brightness.
Filter TypeParticle filter + Carbon sheet. Activated coconut shell carbon. Non-woven gradient Polypropelyne fibers. Free of chemicals and binders. Fiber shedding resistance.
Dimensions(HxWxD)18.5 x 10.2 x 10.2 in
Energy consumption3-36 W
Sound level23-54 dB(A)
Filter recyclingPlastic. Check your local recycling requirements for carbon.
Recommended filter change6 months (4,380 hours) when used 24 hours a day
Recommended room size340 ft2
Air changes per hour (ACH)4.8
Clean air delivery rate (CADR) - Pollen210 cfm
Clean air delivery rate (CADR) - Dust210 cfm
Clean air delivery rate (CADR) - Smoke220 cfm
Number of filters1
Guarantee clean air for years to come with up to 2-years of warranty coverage when you register your air purifier.
While they look similar, our Blue Pure 311 is not the same air purifier as the Blue Pure 311 Auto, which features our upgraded auto-mode functionality and increased Clean Air Delivery Rate (CADR) performance. Due to the size difference, each respective model will have its own replacement filter and pre-filter accessories. All other features stay relatively the same. For the Blue Pure 311, simply press the button on top to control settings depending on your air quality conditions and preferences. To upgrade to Blue Pure 311 Auto, shop here.
Press and hold down the LED button for 10 seconds to reset the replacement filter indicator.
To extend the Limited Warranty from one year to two (2) years, simply complete the product registration form in the 'Warranty' section of your customer account, within (60) days of purchase or register through the Blueair mobile app.
Vacuum the exterior of the fabric pre-filter to remove dust as often as you'd like. When the pre-filter requires a deeper clean, it can be washed on a gentle, low-temperature cycle in the washing machine. Hang to dry.
The LED indicator will turn yellow after 5 months of operation to warn that it's almost time to change the filter. When the indicator light turns red (one month later), it’s time to change the main filter.
The integrated particle sensor measures the concentration of fine particles (PM2.5) in your indoor air. The LED air quality indicator (AQI) display uses a three-color scale to represent current PM2.5 concentrations as good (blue), moderate (yellow), or polluted (red).
The lights on the LED touch-button indicate the selected fan speed setting. Touch once to set to Auto mode (all three LED lights lit). Press twice for the lowest fan speed (top right LED lit), three times for medium (bottom LED lit), four times for high (top left LED lit). Press a fifth time to turn the air purifier off (no LEDs lit).
You'll notice that after about 5 seconds, the LED lights on the touch-button dim down to 0% brightness. To change speed settings, you'll need to tap the button once to 'wake up' the air purifier and then cycle through settings.