Air purifiers / Comparison

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The starting packages are single room purifiers with standard filters. Particle removal, gas removal and health outcomes are different claims.

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Documented specifications and exact purchase packages
Compare the details	Blue Pure 511i Max — US standard package
Community reviews	No community reviews yet. Purchase packages of the same model share one community score. Read all reviews Write a review
US purchase package	Blue Pure 511i Max, Air Purifier Only; standard Particle + Carbon filter and Stockholm Fog pre-filter. Product & sources Includes one purifier, one standard Particle + Carbon filter and one Stockholm Fog fabric pre-filter. Filter subscriptions and optional specialty replacement filters are separate selections. Sources · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value.Blueair: F5MAX Particle and Carbon replacement filter for 511i MaxChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Where to buy	Select: Blue Pure 511i Max, Air Purifier Only; standard Particle + Carbon filter and Stockholm Fog pre-filter. View at Blueair US — Blue Pure 511i Max — US standard package; opens in a new tab The link may open several packages. Check current price and availability with the seller. Opens in a new tab.
External rating	4.8 out of 5 from 267 ratings · Best Buy · Checked October 23, 2026.
Smoke CADR Clean-air delivery rate specifically identified for smoke particles. Compare like-for-like particle ratings; this is not a gas-removal or health-outcome rating.	153 cfm Source · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Dust CADR Clean-air delivery rate specifically identified for dust. Keep this separate from smoke and pollen CADR.	159 cfm Source · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Pollen CADR Clean-air delivery rate specifically identified for pollen. Use the same particle type when comparing models.	174 cfm Source · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
CADR without a named particle type A maker-listed CADR whose particle type is not specified by the cited source. This value is not substituted for a smoke, dust or pollen rating.	Not verified We have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. The cited specifications provide separate particle ratings and no additional unnamed CADR. Source · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Advertised room area The documented room area at the air-change assumption below. Area claims at different ACH are not directly equivalent; check ceiling height and layout.	Not verified We have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. The specification table pairs 237 sq ft with 4.8 ACH, while the page title advertises 465 sq ft without a verified air-change basis. These claims cannot be reconciled into one comparable rating from the cited evidence. Source · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Room-area air changes Air changes per hour used for the displayed room-area claim. Read this together with room area. Actual airflow depends on placement and operating setting.	Not verified We have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. The table gives 4.8 ACH for 237 sq ft. The competing 465 sq ft title claim lacks a verified ACH basis, so a single paired area/ACH rating is not entered. Source · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Rated power The documented rated or maximum electrical input, as qualified by the source. Actual energy use depends on the fan setting. Read the source conditions alongside the value.	17 WListed energy consumption; actual draw depends on fan speed. Source · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
App control Whether the listed model supports control through the manufacturer’s app. Check phone requirements, network setup and which controls remain available on the unit.	Yes Source · 2026-09-13 Blueair: Blue Pure 511i Max — US single-unit product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Standard replacement filter The named replacement for the standard included filter where verified. Match the exact purifier model and distinguish standard filters from optional specialty versions.	F5MAX Particle + Carbon replacement filter for Blue Pure 511i MaxMatch 511i Max; a filter for a similarly named 511 model is not assumed compatible. Source · 2026-09-13 Blueair: F5MAX Particle and Carbon replacement filter for 511i MaxChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Questions to check before buying	The page gives 237 sq ft at 4.8 ACH in its specifications and 465 sq ft in its title without a verified matching ACH basis. Room area and ACH remain unresolved as a single comparison pair.

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