FitCheckrCompatibility verdict
Does Blue Pure 311 Auto filter fit Blue Pure 311 Auto?
Model: Blue Pure 311 Auto
Part: Blue Pure 311 Auto filter
Fit summary
Blue Pure 311 Auto uses a dedicated main filter size separate from the 211+ family.
Blue Pure 311 Auto filter compatibility details for Blueair Blue Pure 311 Auto
Compatibility verdict
Yes, this replacement is marked as a confirmed fit.
Compatible model
Blueair Blue Pure 311 Auto · Blueair Blue Pure 311 Auto Air Purifier
OEM status and part number
Blue Pure 311 Auto filter is marked as OEM in the replacement data.
Replacement interval
About every 6 months
Source confidence explanation
FitCheckr shows this compatibility check with a 88% confidence score based on 3 source signals. Higher confidence means more consistent source evidence, not lab testing.
Blue Pure 311 Auto and 211+ filters are different sizes despite similar family branding.
- Marketplace title says universal fit but does not mention Blue Pure 311 Auto.
- The old part number on your device does not match Blue Pure 311 Auto filter or its known family.
- The listing photo looks close, but the latch, seal, bag type, or frame shape differs.
Does Blue Pure 311 Auto filter fit Blueair Blue Pure 311 Auto?
Yes, this replacement is marked as a confirmed fit.
Which model is Blue Pure 311 Auto filter listed for?
Blue Pure 311 Auto filter is shown on FitCheckr for Blueair Blue Pure 311 Auto Air Purifier (Blue Pure 311 Auto). Always confirm the exact model number on your device before buying.
Is Blue Pure 311 Auto filter an OEM part?
Blue Pure 311 Auto filter is marked as OEM in the current FitCheckr data. Use the official source page when warranty or certification matters.
What should I check before buying?
Check your exact device model, the existing part number, manufacturer instructions, replacement interval, and any latch, seal, chip, bag, cartridge, or frame differences before ordering.
What is this confidence score based on?
3 public source signals are currently reflected in this fit check. FitCheckr combines official pages, manuals, support documents, retailer listings, and public discussion summaries where available.
3 public source signals checked. FitCheckr weighs official pages, manuals, support docs, retailer listings, and public discussion summaries before showing a fit verdict.