Blue Pure 411 Series SmokeBlock FilterCompatible with 411, 411+, 411 Auto; Not compatible with 311 Auto
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Particle removing filtration, air cleaning carbon, all in one filter
Additional activated carbon removes 99.9%² of wildfire emissions for extra protection against smoke, toxic gases, smog and odors.
Keep your filter fresh and pollutants at bay
We recommend replacing your air purifier filter about every 6 months (when used 24 hours a day). That's because, just like a vacuum cleaner, over time air purifier filters can get clogged with pollutants, and even let unpleasant odors back into the room.
It's simple to replace in just a few quick steps, and easy to save with our filter subscription program.
The ultimate tool against wildfire season. Additional activated carbon removes up to 99.9% of wildfire smoke* along with extra protection against other wildfire emissions such as toxic gasses, smog and odors**
The particle filter layer helps to minimize the airborne particles that can trigger allergy symptoms, including pollen, dust, mold spores*, pet dander, viruses*, bacteria*, and fine smoke particles.
This filter's unique structure is designed to filter high volumes of air while trapping even the smallest particles. It maintains maximum airflow because it's engineered to resist clogging.
Our unique HEPASilent™ filtration technology allows this filter to be less dense, meaning it requires less air pressure. With it installed, your air purifier will operate quieter while using less energy.
To maintain optimal performance, we recommend changing your filter about once every 6-months when used 24 hours a day. Don't forget to save with our subscription program.
Filter TypeActivated coconut shell carbon. Non-woven Polypropelyne fibers. Free of chemicals and binders. Fiber shedding resistance.
Dimensions(HxWxD)11.4 x 7.9 x 2.5 in in
Filter recyclingYes, please check your local recycling facility for availability.
Recommended filter change6 months (4,380 hours) when used 24 hours a day
Number of filters1
This filter is compatible with the following Blue family models: 411, 411+, and 411 Auto.
Join free, decide how your filter is monitored, and when new ones get sent. Leave anytime.
Seeing a new filter at your door is like a celebration of your choice to breathe the best air.
Pure Air Program members get 15% off on every filter, plus extended warranty, and exclusive product perks.
¹A flat shipping rate of $25.00 will be charged on filter shipments to Alaska, Hawaii, and Puerto Rico. Additional charges may apply for shipments over 30 lbs. A flat shipping rate of $5 will be charged on orders under $39 that are not part of filter subscription.
² In 60min. Tested on PM 0.4-0.7 um (GB/T 18801-2015).
•Tested on E.coli, Influenza A (H1N1), A.niger with minimum reduction of 99.9% in 60min