Blueair owners must register the product and provide proof of purchase of genuine Blueair filters every 6 months to remain eligible for warranty claims.
Manufacturer recommended filter exchange is also 6 months.
More specifically, Blueair bases their 6-month requirement on 4,380 hours of run time, which works out to 180 days times 24 hours per day.
The new purchase warranty is just 12 months now, buyers must choose between the Blueair filter subscription program, which extends warranty as long as the purchaser keeps buying filters, or winging it.
Particle filters are expended when restricted, clogged enough to reduce airflow meaningfully, NOT when an arbitrary time interval has expired.
This creates a quandary for Blueair owners with low particle load environments, and those who will not be running their air purifiers 24/7 continuously.
Genuine Blueair filters are gradient structured, which means they have progressively finer gaps further into the media.
Intended to run without prefilters, these filters can face load (clog the coarse mesh near the front while fine particle gaps further back remain open) in environments with heavy coarse dust.
Many user reviews say they have extended filter life to one year by carefully vacuuming off this face loaded dust.
HEPA is a filter performance standard, not a kind of filter.
Blueair is careful not to claim true-HEPA performance under all conditions of load and fan speed, quoting instead low speed performance on .1 micron sized particles.
All true-HEPA filters capture 99.97% of .1 micron particles, it is the hardest to catch .3 micron size that determines HEPA performance.
In Blueair's hybrid design particles are negatively charged by ion brushes before reaching the filters, increasing retention with unloaded filters.
Three-filter Blueairs (500 and 600 series) will begin bypassing, lifting the gravity-held center (top) filter a bit, when filters are face-loaded.
Generic replacement products do NOT fulfill warranty requirements.
Substitution of generic HEPA-like filters will save money, but performance may decline.
BlueAir offers two types of filters, standard particle and optional SmokeStop (SS) filters.
Standard particle filters have had some carbon added in recent years, these are black on one side.
Some vendors may still have the older, white-both-sides, genuine Blueair OEM (Original Equipment Manufacturer) filters - these should sell at a discount.
Smokestop models have extra carbon for chemicals and odors, and are even pricier than standard filters.
500 and 600 Series use three filters, purchased as a set, Blueair part number F500600PA.
These filters each measure 13 x 9 x 2.8 in., and ship as a set of 3 which fits Blueair models:
Blueair 500/600 Series Particle Filter, (3) $79.95 at Amazon.com.
Or $79.95 at Blueair.com.
This is a less costly alternative for Blueair three-filter systems.
Unlike many vendors of generic filters, Crucial Air is very upfront in reminding buyers that these filters do NOT qualify as Blueair warranty filters.
Installing generics voids Blueair's warranty, but anybody considering generics has probably made that decision already.
Crucial calls these filters "HEPA," without specifically claiming they retain 99.97% of .3 micron particles.
They also say an odor-neutralizing layer is included.
Crucial Air's set of 3 filters fits the following Blueair Air Purifiers;
User reviews are few but say the Crucial filters fit is good.
There is some mention of initial mild out-gassing, but no performance measurements appear to be available.
The $49.50, prime eligible,
Generic 500/600 Blueair Filters - Crucial Air (3) at Amazon.com.
Another option for the Crucial Air Generics, as described above, a set of 6 for $86.99:
Generic 500/600 Blueair Filters - Crucial Air (6) at Amazon.com.
This is the Genuine Blueair SmokeStop filter set of 3 for:
Blueair users considering upgrading to the SmokeStop option for chemical or odor control should know that these filters are more restrictive than standard Blueair particle filters.
Reduced airflow is noticed, especially by 500 series users.
Smokestop filter users also report lower noise emissions.
Smokestop Filter for Blueair 500/600, (3) is $149.95 at Amazon.com.
Or $179.95 at official Blueair site.
This genuine Blueair single filter fits all Blueair models in the 400 series;
Blueair Particle Filter for 400 Purifier $59.95 at Amazon.com.
And $79.95 at the Blueair site.
No generic filters for Blueair 400's are advertised.
This genuine Blueair single carbon and particle filter fits all Blueair models in the 400 series;
Blueair Smokestop Filter for 400 Purifier $119.95 at Amazon.com.
This is a single genuine Blueair filter for models;
Blueair 200/300 Series Particle Filter is $49.95 at Amazon.com.
Blueair 301 was briefly the original model in the 200/300 series, but that name is rarely used.
$79.95 buys the 200/300 filter at Blueair.
Crucial Air's single filter fits the following Blueair Air Purifiers;
250e and 270E are not on Crucial Air's list, but take the same filters elsewhere.
Remarks above concerning warranty and HEPA specification also apply to this generic filter.
You can browse the $27.95, prime eligible,
Crucial Air Generic Blueair 200/300 filter at Amazon.com.
Amazon also carries the Crucial Air 6 pack of 200/300 generic filters for $130 - $150:
Crucial Air 6 pack of 200/300 generic filters at Amazon.com.
Here is a genuine Blueair replacement filter which fits
Blueair 200/303 Series Smokestop Filter, $99.95 at Amazon.com.
Or $119.95 at BlueAir.
The single Blueair ECO10PF Replacement HEPASilent Particle Filter is available for $99.95:
Blueair ECO10PF Replacement HEPASilent Particle Filter at Amazon.com.