Went to check the manual for a question and just realized out Blue air did not come with a pre-filter. Wasn't it supposed to?

Hi there, your Blue Pure 211+ Auto comes with one pre-filter in Arctic Trail, which may have come pre-installed on the unit (the grey external fabric). If this is not the case, please e-mail info@blueair.com and we will be happy to send a replacement.

From which PM2.5 reading does the air purifier start increasing fan speed?

I have not seen it automatically increase fan speed. I set it on the 1,2 or 3 setting and forget it. Maybe it can alter fan speed but if so it's not noticeable to me.

Where can additional Of the new style Pre-Filters be purchased?

The Blueair website has the pre-filters if you can’t find them here.

I live in the country, lots of dirt + 3 dogs and 2 cats, how often will I need new filter?

Hi there, our formal recommendation is to change the filter every 6 months of continuous use, but you may check your filter periodically and replace it on an "as needed" basis if you prefer.

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🌬️ Elevate your air game—because clean air is the new luxury.

ECO FRIENDLY AIR CARE - Energy Star rated, uses less power than an LED bulb, saving you money and the planet.
WHISPER QUIET WELLNESS - Operates at just 23 dB—quieter than a whisper, perfect for focused work or restful sleep.
ALLERGEN ODOR ASSASSIN - Removes 99.99% of allergens and traps odors down to 0.1 micron—smoke, pet dander, cooking smells gone.
BREATHE PURE LIVE BETTER - HEPASilent dual filtration cleans 550 sqft in 12.5 min—fast, quiet, and efficient.
AWARD WINNING DESIGN PERFORMANCE - Most awarded US air purifier brand with sleek Swedish style that fits your modern space.

The Blueair Blue Pure 211+ Auto air purifier uses patented HEPASilent dual filtration technology to clean large rooms up to 550 sqft in just 12.5 minutes with 67% less noise than traditional HEPA filters. Energy Star certified and whisper-quiet at 23 dB, it removes 99.99% of allergens, viruses, and particles down to 0.1 micron, while its carbon filter traps household odors. AHAM verified with a high CADR, this award-winning purifier combines performance, efficiency, and sleek Scandinavian design to deliver healthier air effortlessly.

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Colour	White
Brand	Blueair
Product Dimensions	13D x 13W x 20H Centimeters
Floor Area	550 Square Feet
Specification Met	aham
Noise Level	23 Decibels
Particle Retention Size	0.1 Micron
Controller Type	Button Control
UPC	689122019642 689122018904 689122016214
Special Feature	HEPASilent Dual Filtration, Filter Change Indicator, AHAM Verified
Manufacturer	Blueair, [email protected]
Manufacturer	Blueair
Item model number	3631101000
ASIN	B08LQQKD8B

Blueair air purifier pollutants upto 0.03 micron Particle + Carbon Filter Energy,AHAM Verified,Filter change Indicator Unique HEPA Silent technology combines 2 filteration technology White large

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