Blueair Blue Pure 121 replacement filter
Checked against Blueair’s official page on · US model
✓ This is the filter you need
Blueair Blue Pure 121 Particle + Carbon Filter
Filter
Blue Pure 121 Particle + Carbon Filter
Part number
F121PACF104507 · 1 filter
Replace
About every 6 months (red indicator)
ParticleActivated carbon
Find this filter on Amazon
Match the genuine part number shown above before you buy. Paid link.
Your purifier
Blueair Blue Pure 121Match the model on the label exactly — similar names can use different filters.
Why we’re sure
“Compatible with Blue Pure 121”
- Source
- Blue Pure 121 Particle + Carbon Filter
- Type
- Manufacturer filter page · blueair.com
- Where
- Product header – “Compatible with” line
- Checked
More evidence (part numbers, quantity, interval)
Part number F121PACF104507
“Variant SKU: F121PACF104507 (Particle + Carbon)”
- Source
- Blue Pure 121 Particle + Carbon Filter
- Type
- Manufacturer filter page · blueair.com
- Where
- Product variant SKU in the manufacturer store product data
- Checked
Replacement interval
“A red filter replacement indicator appears … after about 6 months”
- Source
- Blue Pure 121 Particle + Carbon Filter
- Type
- Manufacturer filter page · blueair.com
- Where
- FAQ – when to replace
- Checked