Find a purifier for the room and the way you use it.

A separate cooling fan is not the same as a purifier with a built-in circulation-fan function. Shark TF202SHP includes one HP072 purifier and one TF202SWH fan; only the purifier receives the one-ACH room rating.

This is about buttons or controls on the appliance, not whether a phone app also exists.

A sensor target is confirmed only where a model source identifies it. The C535 manual identifies its Auto sensor as detecting odorous gas; it does not document particle-sensor Auto. Shark HP162 manufacturer copy identifies VOC/odor-aware automatic response; that does not by itself establish a numeric PM2.5 readout or a strict TVOC sensor label. Shark HP062 exact copy identifies VOC/odor sensors but does not resolve a strict TVOC label or a particle-responding Auto target.

This is an occupancy/movement response that can raise fan speed, not an air-particle or VOC measurement. If motion-linked changes would be distracting, leave this optional choice open and read the review's control tradeoffs.

This is a purifier with a wake-up clock, not a general night-light or a promise of a sleep benefit. Blueair Mini Restful requires its app for alarm setup; see the exact review.

The Vital 100S-P and Vital 200S-P use color indicators and app updates, not a documented numeric PM2.5 display on the unit. The Coway Airmega 250 family has color-only unit feedback; the 250S app may show numeric particle values, but the unit itself remains non-numeric. A particle sensor is not a gas sensor. Some appliances change the number display by operating mode; if a numeric PM2.5 reading must remain visible during heat, the selected operating plan must support it. The Blueair Classic Pro CP7i toggles its local display among PM1, PM2.5 and PM10 readings one at a time; it is not a TVOC meter. Shark HP162’s page describes air-quality/VOC/particle information, but no numeric PM2.5 value on the unit is confirmed; keep qualitative levels distinct from a PM2.5 concentration. Shark HP062 adds local air/VOC/particle information, but its guide-level pollutant bands do not confirm an on-unit numeric PM2.5 concentration. The HP072 manual evidence is an HP070-family guide with a suffix/edition caveat; its Clean Air % is not a numeric PM2.5 reading.

The EverestAir-P physical control cycles through 45°, 60°, 75° and 90°; app controls can choose intermediate positions. Outlet direction does not remove the need for front intake clearance.

Wheels can help reposition a purifier on one floor, but do not change its weight or make it easy to carry upstairs.

Oil on a scent pad adds fragrance; it is not a gas sensor or a substitute for particle filtration. Follow the exact manual and never put oil on filter media.

A selectable night light is not necessarily dimmable. Check that the exact manual describes the light option and its off state.

The Sprout manual documents five Baby Sleep Mode presets and a default 30-minute light/sound routine; its app lets you customize preset and duration. This is an operating option, not evidence of a sleep or health benefit.

The Vital 100S-P and Vital 200S-P manuals document a 15-minute-high / 60-minute-medium Pet Mode cycle. That is different from the Vital Pet Pro’s automatic pre-filter cleaning, and its manual does not document the same fixed fan cycle.

Blueair PetAir Pro includes a Quilt Bed on top of the purifier. Blueair advertises it for pets up to 25 lb; its manual also warns that objects over 1.1 lb may activate Smart Mode. That is not phrased as a structural load limit, so check the exact guidance if the pet-weight interaction matters.

The PetAir Pro box must be emptied by hand; a soft brush/vacuum for the pre-filter is not included. A fur box does not remove hair from floors or upholstery.

PetAir's product page calls this Pet mode, while its manual describes Smart Mode, pet-weight input, a Silent Mode response and a separate Pet Lock button. This is not a fixed high/medium Pet Mode cycle.

Some models offer several selectable modes, but the manual may describe them as alternatives rather than concurrent behavior. This asks whether both behaviors are supported together in one operating arrangement.

The Vital Pet Pro runs the cycle daily by default and lets you adjust it in the app. The tray still needs emptying, and Levoit still recommends cleaning the screen every 2–4 weeks.

The Core P350-P calls its feature Pet Lock; the Vital Pet Pro calls it Display Lock. Both prevent accidental button changes, but the Pro’s app can still adjust settings while its display lock is on.

Turbo is the highest-output and loudest fan setting in these manuals.

These are separate compatible replacement filters, not four filters or modes included in the purifier box. The Blueair Mini Max Auto's exact page offers a base Particle & Carbon selection, but its dedicated Mini Max replacement page omits 'Auto' in the compatibility statement; specialty replacements are not an essential match without confirmation.

A two-unit package can serve two separate rooms. Do not add room-area ratings together into a larger single-room claim. Shark HP072B2 contains two HP072 units, each rated 250 sq ft at 1 ACH; HP062B2 contains two HP062 units, each rated 300 sq ft at 1 ACH. Shark HP162B2 contains two HP162 units, each with a 750-sq-ft-at-1-ACH figure; do not treat this as one 1,500-sq-ft room.

A scent cartridge is different from a carbon filter. If box contents are not itemized, treat absence as unknown rather than assume the aroma can be removed after purchase.

Use “Yes” when you are checking an older model you already own or a specific seller offer. It does not establish stock, condition, warranty or replacement-filter availability.

This is the published repeated-cleaning benchmark, not a one-hour or 1-ACH headline. Blueair lists the Blue Signature Large SP4i at 705 sq ft at 4.8 ACH and separately lists 3,385 sq ft in one hour. Use the exact threshold when the faster repeated-air-change basis matters; unknown values do not meet it.

Use this optional limit only if a 2-ACH room-area figure is the basis you want. The Coway Airmega 100 is listed at 405 sq ft at 2 ACH and Airmega 150 at 518; other models without a matching 2-ACH figure remain unknown and will not meet an essential numeric requirement. The ProX is directly listed at 2,126 sq ft, so this numeric limit includes higher-capacity options as well as smaller models. The Airmega 450 is directly listed at 1,643 ft² at 2 ACH, while its 4.8-ACH comparison is calculated separately.

This optional, slower-rate comparison is not equivalent to a 4.8-ACH rating. Shark HP102 and HP202 publish 500 and 1,200 sq ft at 1 ACH respectively. If repeated faster cleaning is essential, use the separate 4.8-ACH question; unknown one-hour figures cannot meet it. Shark HP162 adds a 750-sq-ft maximum-fan figure at 1 ACH only; it does not establish faster coverage. Shark HP062 adds a separate 300-sq-ft maximum at 1 ACH on max fan; faster coverage remains unknown. Shark HP072 and HP072B2 are listed up to 250 sq ft at 1 ACH per underlying unit; a two-unit bundle does not support a 500-sq-ft single room. Shark HP062B2 offers two HP062 units, but each retains its own 300-sq-ft-at-1-ACH limit; two devices do not create one 600-sq-ft room rating. Shark HP162B2 is another two-unit offer; its 750-sq-ft 1-ACH limit applies to each HP162, not to 1,500 sq ft in one room.

This is the product-body width only. Preserve the manual's open clearance around the unit.

Compare published product-body depth only. Keep the manual-required intake/outlet clearance separate. If a product page and manual disagree, its depth is unknown and cannot meet a strict fit limit.

Compare published product-body height only; keep required air clearances and any stand or pedestal space separate. If a manufacturer page and manual disagree, the height is unknown for a strict limit.

PetAir Pro is advertised for pets up to 25 lb. Its manual separately says objects placed on the appliance should not exceed 1.1 lb to prevent accidental Smart Mode activation; it does not phrase this as a structural load limit. Treat this as Blueair's advertised pet limit, not an independent load test, and ask the manufacturer if the interaction is essential.

CADR is a standardized air-delivery figure; compare it alongside the same room-size/air-change basis.

Conflicting listing/manual values are not treated as a settled rating and cannot satisfy this limit.

A TVOC reading adds a VOC/odor signal but does not identify every gas or its source. The Vital Pet Pro manual documents a TVOC sensor; models without confirmation do not meet this essential requirement. Blueair's Classic Pro sensor FAQ identifies CP9i, not CP7i, as the tVOC-sensing version; do not merge their features. The Shark HP362 exact page also identifies VOC/odor sensors and a local VOC display; it does not establish a CFM CADR. Shark HP162’s reviewed page says VOC/odor sensing but does not explicitly say TVOC; strict total-VOC identity remains unknown for this model.

A CO₂ reading can signal when ventilation is needed. It does not mean the purifier filters or removes carbon dioxide.

A switch can disable the ionizer but does not remove its hardware. Coway calls the AP-1512HH feature a Vital Ionizer; its manual gives an on/off button. A manual ozone-compliance statement is not an independent ozone measurement. The Blueair Mini Max Auto is different from a standalone ionizer toggle: the manual says ionization runs automatically at fan speed 3 and stops when another speed or standby/off is selected; Auto could select speed 3.

Use only if a manufacturer-listed maximum noise figure is essential. It is a published range endpoint, not an independent sound test or a guarantee for every speed, room, or listening position; unknown/conflicting maxima do not meet a strict cap. Blueair lists 24–55 dB for Classic Pro CP7i but does not state the weighting on that page, so it does not satisfy a strict dB(A) cap.

App-connected does not mean every function is available in the app. Blueair ComfortPure T10i/T20i explicitly cannot start heating through the app, and their temperature target is set at the unit.

Only a mode-specific manufacturer rating qualifies. A general purifier rating or a statement that output is purified while heating does not establish the same airflow rate in heat mode; unknown values do not meet an essential limit.

The DH3i manual/page specifies 3 L. The 2-in-1 Pro page specifies 1.3 U.S. gallons, about 4.9 L by unit conversion. An unknown tank capacity does not meet a hard minimum.

Use this only when an unqualified room-area headline is acceptable. Dyson states up to 203 sq ft for the HJ10 but gives no ACH basis for that area; its separately stated 131-CFM CADR is not the same number. If you require a specified 1-, 2- or 4.8-ACH room area, use that separate limit instead. Unknown or smaller claims do not meet an essential threshold.