Blueair · 311i+ Max
Ready to buy
The retained reference is $239.99 current direct sale; $299.99 list. Sale and subscription prices move; confirm the plus suffix, selected standard filter and final one-time checkout. Confirm an exact genuine replacement filter is available before the return window closes.
Current market
Each line carries its own check date because price, software, specifications, and product cycle do not age at the same speed.
Sale and subscription prices move; confirm the plus suffix, selected standard filter and final one-time checkout. Confirm exact current U.S. checkout price, tax and delivery before paying.
Blue Pure 311i+ Max is coherent when its 525-square-foot AHAM basis and narrow footprint fit better than the 211i Max, provided the exact plus model, filter and always-on electrostatic stage are confirmed.
Other paths
These are not generic competitors. Each one represents a different way to buy into the same market.
Coway
Levoit
What changed
Older observations stay in the ledger when the current view changes. That lets a buyer tell the difference between an old complaint, an active issue, and a problem that was corrected.
Blue Pure 311i+ Max was checked against exact manufacturer identity and operating material, current U.S. price, filter availability and cost, room-size test basis, independent comparison and bounded owner evidence.
Each amount stays tied to its source and capture date. Conflicting prices remain visible until the seller resolves them.
Current reference priceA structured timeline will begin with the next source capture
Owner experience
Owner discussion returns to plus-versus-regular model confusion, fan sound, app pairing, sensor response and specialty-filter value rather than a universal air-quality outcome.
These are self-reported experiences from different room volumes, ceiling heights, layouts, sources, outdoor conditions, fan speeds, filter ages, placements, app versions, electrical conditions and individual sensitivities. They identify checks to run and do not prove exposure reduction, symptom improvement, gas removal, smoke safety, mold remediation, reliability or failure rates.Exact-model owners discuss room fit, sensor response, app setup, fan sound and filter subscriptions. The reports are self-selected.
Verify the model label, compare the standard and specialty-filter annual costs and test the everyday speed in the actual room.
1 evidence recordSources
The page separates what a source states directly from what we conclude across sources.
Blueair identifies exact model 311i+ Max as a narrower 360-degree purifier with 339 cfm smoke CADR, app and PM2.5 automation, interchangeable filters and integral electrostatic assistance.
$239.99 current direct sale; $299.99 list was retained for exact model 311i+ Max. Sale and subscription prices move; confirm the plus suffix, selected standard filter and final one-time checkout
The 311i+ Max uses its own washable fabric pre-filter and model-specific Particle & Carbon cartridge; AllergenBlock and SmokeBlock options change media and price Current U.S. specifications list 339 cfm smoke, 370 dust and 446 pollen, mapping to 525 square feet at 4.8 ACH. This must not be replaced with the regular 311i Max's lower figures Blueair lists 23 to 50 dB and 38 W across three speeds, auto and night; a published endpoint is not a same-condition noise-adjusted delivery measure The consumer particle sensor reports PM2.5 and drives auto mode; it cannot diagnose sources or represent CO, CO2 and most gases
The standard filter is $49.99, AllergenBlock $69.99 and SmokeBlock $64.99 before subscriptions; choose one exact annual-cost path rather than averaging incompatible filters Clean and completely dry the fabric, keep the circular intake and top outlet clear, replace rather than wash the cartridge and reset RealTrack only after service Schedules, remote settings and readings require the Blueair app, Wi-Fi, account and cloud processing; on-device controls remain available for basic operation Blueair provides an exact current page, model filters, trial and registration-based warranty extension; verify warranty length and filter-subscription terms
EPA treats portable filtration as a supplement to source control and clean-air ventilation, sizes particle cleaners by CADR and room volume, separates particle from gas filtration and states that no air cleaner removes every pollutant.
AHAM's suggested room size uses 4.8 air changes per hour and publishes separate tobacco-smoke, dust and pollen CADRs; room height and desired repetition remain part of sizing.
CARB certification addresses low ozone emissions and electrical safety under its regulation; CARB explicitly says listing does not establish cleaning effectiveness or complete health safety.
The 2026 comparative table retains exact model identity, particle performance by speed, sound, filter cost, energy and feature columns under a common test program.
Exact-model owners discuss room fit, sensor response, app setup, fan sound and filter subscriptions. The reports are self-selected.
Airmega 350 is the high-output cylinder without cloud control alternative at $339 current direct U.S. price.
Vital 200S-P is the pet-hair-oriented medium-room mechanical platform alternative at $169.99 current direct sale; $189.99 list.
Manufacturer identity, exact filter and manual or support material, current U.S. price, AHAM or published CADR and room-size basis, independent comparative or instrumented editorial, CARB ozone context, EPA limitations and bounded owner evidence were checked on August 17, 2026. This desk covers complete current U.S.-market portable room air purifiers for serious home use. It excludes HVAC filters, industrial scrubbers, dehumidifiers, unsupported marketplace devices, filter-only products and cosmetic-only variants. CADR measures particle clean-air delivery under stated conditions; it is not a gas-removal rating, health guarantee or proof that one unit serves a whole home. Room-size headlines at one, two and 4.8 air changes per hour are not interchangeable. Sound, energy, filter efficiency, sensor readings, app features, auto modes, carbon labels, HEPA wording, CARB listing and ENERGY STAR status each have separate test boundaries. Source control and clean-air ventilation remain primary. No purifier prevents, treats or diagnoses illness, guarantees exposure reduction or smoke safety, remediates mold or assures universal indoor-air outcomes. Carbon monoxide alarms, moisture repair, professional hazardous-material work and public-health guidance remain separate needs.
Researching another model?