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Honeywell HPA300 HEPA Air Purifier vs Blueair Blue Pure 311i Max

Honeywell HPA300 HEPA Air Purifier leads 3 to 2 on the 5 rankable specs, but Blueair Blue Pure 311i Max costs $20 less.

Catalog as of September 1, 2026

Why, in numbers

  • CADR: Honeywell HPA300 HEPA Air Purifier lists 300 CFM (Smoke), 320 CFM (Dust), 300 CFM (Pollen) (Honeywell sheet, 2026-09-02); Blueair Blue Pure 311i Max lists 250 CFM (Smoke), 250 CFM (Dust), 250 CFM (Pollen) (Blueair sheet, 2026-09-02).
  • Coverage area: Honeywell HPA300 HEPA Air Purifier lists 465 sq ft (4.8 air changes/hr) / 2,250 sq ft (1 air change/hr) (Honeywell sheet, 2026-09-02); Blueair Blue Pure 311i Max lists 387 sq ft (4.8 air changes/hr) / 929 sq ft (2 air changes/hr) (Blueair sheet, 2026-09-02).
  • Room size: Honeywell HPA300 HEPA Air Purifier lists Extra large rooms, master suites, open spaces up to 465 sq ft (4.8 ACH) (Honeywell sheet, 2026-09-02); Blueair Blue Pure 311i Max lists Medium to large bedrooms, living rooms, and open offices up to 387 sq ft (4.8 ACH) / 929 sq ft (2 ACH) (Blueair sheet, 2026-09-02).
  • Filter types: Honeywell HPA300 HEPA Air Purifier lists Type A Activated Carbon Pre-filter + 3× Type R True HEPA filters (Honeywell sheet, 2026-09-02); Blueair Blue Pure 311i Max lists HEPASilent Main Particle + Carbon filter with customizable machine-washable fabric pre-filter (Blueair sheet, 2026-09-02).
  • Filter life: Honeywell HPA300 HEPA Air Purifier lists 3 months (Pre-filter) / 12 months (True HEPA filters) (Honeywell sheet, 2026-09-02); Blueair Blue Pure 311i Max lists 6 to 9 months (tracked by RealTrack algorithm in app) (Blueair sheet, 2026-09-02).

Manufacturer list price, not a live offer. Confirm current pricing before you buy.

Honeywell HPA300 HEPA Air Purifier
$2493 spec wins
Swap

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Blueair Blue Pure 311i Max
$2292 spec wins
Swap

Compare a different air purifier

Levoit Core 300S Smart True HEPA Air Purifier$149Winix 5500-2 Air Purifier$159Levoit Core 400S$219Coway Airmega AP-1512HH Mighty$229Levoit Core 600S Smart True HEPA$299Blueair Blue Pure 211+ Auto$339Coway Airmega 250$399Coway Airmega 400$549Blueair Protect 7470i$649Alen BreatheSmart 75i Large Room Air Purifier$749Dyson Purifier Hot+Cool Formaldehyde HP09$799

Buying for

Every rankable spec counts once. Pick a lens to score only what matters for your air purifier.

Straight answer

Overall: 3 to 2

Buy the Honeywell HPA300 HEPA Air Purifier.

  • Leads 3 of 5 rankable overall specs; Blueair Blue Pure 311i Max takes 2.
  • CADR: 300 CFM vs 250 CFM
  • Coverage area: 465 sq ft vs 387 sq ft
  • Blueair Blue Pure 311i Max is $20 cheaper. Pay the difference only if cadr matters to you.

Check first: the Honeywell HPA300 HEPA Air Purifier has over 55 dB on high. Tick them under deal-breakers if that rules it out.

3 Honeywell HPA300 HEPA Air Purifier5 rankable of 11 specsBlueair Blue Pure 311i Max 2

Deal-breakers

tick what would make you walk away

  • row

    Louder than normal conversation at full speed.

    Trips:Honeywell HPA300 HEPA Air Purifier · 38 dB (Low) – 58 dB (Turbo)Clear:Blueair Blue Pure 311i Max · 23 dB (Night mode) – 50 dB (Max boost)
  • row

    Undersized for an open-plan living area.

    Trips:Honeywell HPA300 HEPA Air Purifier · 465 sq ftTrips:Blueair Blue Pure 311i Max · 387 sq ft

At a glance

The handful of numbers that decide most purchases in this category.

2 of 2 differ

CADR

Honeywell

300 CFM (Smoke), 320 CFM (Dust), 300 CFM (Pollen)

Blueair

250 CFM (Smoke), 250 CFM (Dust), 250 CFM (Pollen)

Coverage area

Honeywell

465 sq ft (4.8 air changes/hr) / 2,250 sq ft (1 air change/hr)

Blueair

387 sq ft (4.8 air changes/hr) / 929 sq ft (2 air changes/hr)

True 3-Year Cost of Ownership (TCO)

Upfront price + 3 years of consumables, fees & essential add-ons

Honeywell HPA300 HEPA Air Purifier

Upfront list price$249
3-Yr 3x HRF-R3 HEPA + 4x Pre-filters (Annual full filter set (~$65/yr))+$195
3-Year Estimated Total$444

Blueair Blue Pure 311i Max

Upfront list price$229
3-Yr SmokeBlock combo filter (Every 6–9 months (~$35/yr))+$105
3-Year Estimated Total$334

Room Placement & Bedroom Noise Check

Physical clearance required for airflow, wall placement, and bedroom noise levels.

Ergonomic & Spatial Check

Wall Clearance Required

Cylindrical 360° filters cannot sit flush against walls without choking intake.

Honeywell

Front grille intake: can back up close to baseboards

Blueair

360° fabric pre-filter intake (needs 12 in wall space)

Nighttime Sleep Mode Noise

Levels below 25 dB are virtually silent for light sleepers.

Honeywell

30 dB lowest fan speed (noticeable background white noise)

Blueair

23 dB lowest speed setting

Unit Footprint & Dimensions

Honeywell

Large commercial-grade shell (20.8 × 22.3 × 10.8 in; 17.0 lb)

Blueair

Cylindrical aesthetic (12.4 × 12.4 × 18.9 in; 7.8 lb)

The 90-Day Owner Regret Check

Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.

Post-Purchase Truths

Honeywell: What to watch for

  • Maintenance

    Requires periodic filter replacements to maintain airflow and odor capture.

    Activated carbon and HEPA media gradually saturate, needing replacement once or twice yearly depending on air pollution and pet shedding.

Blueair: What to watch for

  • Maintenance

    Outer fabric pre-filter attracts visible pet fur and lint.

    The decorative fabric outer sleeve functions as the coarse pre-filter, requiring weekly vacuuming to avoid looking dusty in living rooms.

Honeywell HPA300 HEPA Air Purifier$2493 wins
Blueair Blue Pure 311i Max$2292 wins

Performance

leads 2-0
Performance specifications. Middle column is Honeywell HPA300 HEPA Air Purifier, right column is Blueair Blue Pure 311i Max.
CADR300 CFM (Smoke), 320 CFM (Dust), 300 CFM (Pollen) (wins this row: higher)250 CFM (Smoke), 250 CFM (Dust), 250 CFM (Pollen)
Room sizeExtra large rooms, master suites, open spaces up to 465 sq ft (4.8 ACH)Medium to large bedrooms, living rooms, and open offices up to 387 sq ft (4.8 ACH) / 929 sq ft (2 ACH)
Coverage area465 sq ft (4.8 air changes/hr) / 2,250 sq ft (1 air change/hr) (wins this row: higher)387 sq ft (4.8 air changes/hr) / 929 sq ft (2 air changes/hr)

Filters

2 differences
Filters specifications. Middle column is Honeywell HPA300 HEPA Air Purifier, right column is Blueair Blue Pure 311i Max.
Filter typesType A Activated Carbon Pre-filter + 3× Type R True HEPA filtersHEPASilent Main Particle + Carbon filter with customizable machine-washable fabric pre-filter
Filter life3 months (Pre-filter) / 12 months (True HEPA filters)6 to 9 months (tracked by RealTrack algorithm in app)

Usability & Smart

leads 1-0
Usability & Smart specifications. Middle column is Honeywell HPA300 HEPA Air Purifier, right column is Blueair Blue Pure 311i Max.
Noise levels38 dB (Low) – 58 dB (Turbo)23 dB (Night mode) – 50 dB (Max boost) (wins this row: lower)
Energy consumption130 W max power consumption38 W max power consumption (Energy Star Most Efficient)
Smart featuresNo (manual touch controls with 2/4/8 hr auto-off timer)Blueair App (iOS/Android), voice control with Amazon Alexa and Google Assistant, geofencing Welcome Home feature
Air quality sensorsNo automated air quality sensors (filter replacement indicators)Laser particle sensor with 5-color LED air quality indicator ring (PM1, PM2.5, PM10)

Design & Ownership

2 differences
Design & Ownership specifications. Middle column is Honeywell HPA300 HEPA Air Purifier, right column is Blueair Blue Pure 311i Max.
Weight17.0 lb (7.7 kg)7.8 lb (3.5 kg) (wins this row: lower)
Warranty5 years manufacturer limited warranty (wins this row: higher)2 years limited warranty (extendable to 3 years with product registration)
Most rows are from the official spec sheet. Marked rows are other published figures or our summary, not lab tests we ran.
Honeywell HPA300 HEPA Air Purifier source (opens in a new tab)Blueair Blue Pure 311i Max source (opens in a new tab)

Which one should you buy

Pick this one if

Honeywell HPA300 HEPA Air Purifier

Extra-large room True HEPA air purifier with Turbo Clean mode, dual-stage filtration, and AHAM Verifide CADR ratings for large rooms.

  • Powerful high-volume CADR (300+ CFM) for large rooms up to 465 sq ft
  • Certified True HEPA captures 99.97% of airborne particles
  • Durable workhorse build with touch-button controls

What you give up

  • High power consumption (up to 130W on Turbo)
  • No Wi-Fi app or smart automated air quality sensors
Full Honeywell HPA300 HEPA Air Purifier specs →

Pick this one if

Blueair Blue Pure 311i Max

Smart air purifier with HEPASilent dual filtration technology, cleaning up to 929 sq ft in 30 minutes, 23dB whisper quiet operation, and Blueair app control.

  • HEPASilent dual filtration combines electrostatic and mechanical filtration for faster airflow at lower noise
  • Cleans up to 387 sq ft in 12.5 minutes (4.8 ACH) / up to 929 sq ft in 30 minutes (2 ACH)
  • Ultra-quiet 23dB Night Mode with Energy Star certified low electricity draw

What you give up

  • Fabric pre-filter covers the exterior and requires periodic vacuuming/washing
  • Filter replacements needed every 6 to 9 months
Full Blueair Blue Pure 311i Max specs →

Best for each use

Bedrooms

Quiet nights: low-speed noise, sleep mode, schedules from your phone

For bedrooms, buy the Blueair Blue Pure 311i Max.

  • Leads 2 of 2 rankable bedrooms specs.
  • Noise levels: 23 dB vs 38 dB
  • Weight: 7.8 lb vs 17.0 lb
  • It is also $20 cheaper.

Big rooms & allergies

Open-plan rooms or allergies: CADR, coverage, filter grade

For big rooms & allergies, buy the Honeywell HPA300 HEPA Air Purifier.

  • Leads 2 of 2 rankable big rooms & allergies specs.
  • CADR: 300 CFM vs 250 CFM
  • Coverage area: 465 sq ft vs 387 sq ft
  • Blueair Blue Pure 311i Max is $20 cheaper. Pay the difference only if cadr matters to you.

Low running cost

Cheap to own: filter life, power draw, warranty

Too close to call on low running cost from the spec sheets. Only warranty is rankable here.

  • Filter life: 3 months vs 6 to 9 months
  • Energy consumption: 130 W max power consumption vs 38 W max power consumption

Every answer above is scored from published figures. A lens uses only the rows that matter for that use, including marked rows that are not on the official sheet. Switch lenses interactively in the panel above.

Done deciding?

Open the full standalone spec sheet for either device.

Honeywell HPA300 HEPA Air Purifier spec sheetBlueair Blue Pure 311i Max spec sheet

Manufacturer pages: Honeywell HPA300 HEPA Air Purifier ↗ · Blueair Blue Pure 311i Max ↗

Common questions

Which is cheaper, the Honeywell HPA300 HEPA Air Purifier or the Blueair Blue Pure 311i Max?

Blueair Blue Pure 311i Max costs $20 less at list price.

What is the biggest catch with the Honeywell HPA300 HEPA Air Purifier or Blueair Blue Pure 311i Max?

Honeywell HPA300 HEPA Air Purifier has this deal-breaker: over 55 dB on high. Louder than normal conversation at full speed.

Which is better for bedrooms, the Honeywell HPA300 HEPA Air Purifier or the Blueair Blue Pure 311i Max?

For bedrooms, buy the Blueair Blue Pure 311i Max. Leads 2 of 2 rankable bedrooms specs. Noise levels: 23 dB vs 38 dB

What cannot be compared from spec sheets?

Of the 11 specs tracked here, 6 are descriptive and cannot be ranked on numbers alone. Spec sheets also cannot measure subjective factors like build quality, real-world performance, or comfort.

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