How long does a filter last? I bought mine 3 weeks ago and the red light already came on signaling it needs to be replaced.

Which red light? The red light for filter replacement is on top and shouldn't come for 6 months or more depending on how long and high the fan setting. Page 11 of manual. The red led on front side is red if polluted air is detected, then yellow then blue when air is clear. Page 10.

How much do the filters cost and where do I get them

As of 7/13/2022, Amazon sells replacement filters. Original is $21.

Do you have to use auto mode? To reduce noise we may want to use low setting at certain times, is that do-able?

You do not have to use these machines in Auto Mode. You can set to a manual speed if you would prefer to have controls over the fan speeds.

Consumer reports rates the 411 Auto very poorly for filtration at any speed. Does the manufacturer have a response to this?

I subscribe to consumer reports, but I am not always a fan of their review methodology. I think the problem here is that they compare all sizes of purifiers together, when the smaller units should be compared with other smaller units. Of course, a larger unit with higher CFM air flow and larger filter area will perform better than a smaller unit. Other review sites gave this purifier good ratings for its size. Some recommend just buying the larger unit, which is rated highly by Consumer Reports and running on a lower speed setting.

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BLUEAIR Bedroom Air Purifier, Air Cleaner Dust Pet Dander Smoke Mold Pollen Bacteria Virus Allergen, Odor Removal, for Home Office Kitchen, Washable Pre Filter, HEPASilent, Medium Room, Blue 311 Auto

BLUEAIR Bedroom Air Purifier, Air Cleaner Dust Pet Dander Smoke Mold Pollen Bacteria Virus Allergen, Odor Removal, for Home Office Kitchen, Washable Pre Filter, HEPASilent, Medium Room, Blue 311 Auto

Product ID: 222499130

Details

Brand
BLUEAIR
Color
White
Item Weight
5 Kilograms
Power Source
Corded
Product Dimensions
10.2"D x x

⚡3W ultra-low energy use

🔇23dB whisper-quiet operation

🌬️388 sqft cleaned in 12.5 min

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€ 942.77

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Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌿 Breathe smart, live fresh — the silent guardian of your indoor air

SMART AUTO MODE - One-touch sensor-driven fan adjusts air quality in real-time for effortless freshness
ODOR PARTICLE DEFENSE - Removes 99.97% of particles down to 0.1 micron plus traps household odors with activated carbon
HEPA SILENT™ DUAL FILTRATION - 45% faster cleaning with 67% less noise than traditional HEPA filters—breathe better, quieter
ENERGY STAR CERTIFIED EFFICIENCY - Consumes less power than an LED bulb (3W) to protect your wallet and the planet
AWARD WINNING SCANDINAVIAN DESIGN - Sleek, compact, and customizable pre-filters that elevate your space while purifying your air

The BLUEAIR Blue Pure 311 Auto is a medium-room air purifier that cleans 388 sqft in just 12.5 minutes using patented HEPASilent™ technology. It combines mechanical and electrostatic filtration to remove 99.97% of airborne particles as small as 0.1 microns, including pollen, smoke, pet dander, and viruses, while also trapping odors with a carbon filter. Operating at whisper-quiet 23 dB and ultra-low 3W power consumption, it features an intelligent auto mode with real-time air quality sensing and LED indicators. This Energy Star certified purifier boasts award-winning Scandinavian design with washable, customizable pre-filters, making it a top choice for allergy sufferers and eco-conscious professionals seeking effortless, high-performance air quality management.

Specifications

ASIN	B08F13L1CH
Best Sellers Rank	#67,551 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #297 in HEPA Filter Air Purifiers
Brand Name	BLUEAIR
Color	White
Contaminant Filtration Capability	True
Control Method	Touch
Controller Type	Button Control
Customer Reviews	4.6 4.6 out of 5 stars (3,133)
Filter Class	HEPA + Carbon
Filter Type	Pre-Filter
Floor Area	388 Square Feet
Global Trade Identification Number	00689122013695
Included Components	Blue Pure 311 Auto Purifier, Washable Pre-filter in Arctic Trail
Item Dimensions D x W x H	10.2"D x 10.2"W x 20.5"H
Item Type Name	Air Purifier
Item Weight	5 Kilograms
Manufacturer	Blueair
Model Number	3431101000
Noise Level	23 Decibels
Part Number	311PACF105529
Particle Retention Size	0.1 Micron
Power Source	Corded Electric
Special Features	Manual
Specification Met	Energy Star Certified
UPC	689122013695 689122019635
Unit Count	1.0 Count
Wattage	3 watts

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