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Compare five air purifiers by published noise, room coverage and CADR. Philips AC0820/10 has the lowest stated sleep-mode figure in this source pack; other models suit different room and control needs.
Quick answer
This list orders the supplied models by their published minimum noise figure. Philips AC0820/10 and Levoit Core 300S have stated sleep-mode figures; where a manufacturer gives only an overall noise range, that is labelled clearly.
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Quietest published sleep mode
Its manufacturer sleep-mode figure is 19 dB(A), the lowest published sleep figure in this source pack. Lights are dimmed, not switched off. Limitation: the room-size and cleaning-time figures use different bases, so check the stated assumptions.
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Quiet smart controls with lights off
Sleep Mode is rated at 22 dB and turns the display lights off. The manufacturer gives 50 m² at two air changes per hour or 100 m² at one. Limitation: no CADR is present in the supplied source.
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Low-noise option with published CADR
The main copy states 23 dB in Sleep Mode, while one gallery description says 24 dB; this comparison uses 24 dB. Limitation: the manufacturer page gives no other mode-by-mode noise range in the supplied evidence.
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Compact choice with published sound range
The manufacturer gives a sound range of 24–49 dB and about 16 m² recommended room size at 4.8 air changes per hour. Limitation: no sleep-mode dB value or display-light behaviour is published in the source pack.
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Larger capacity with low-speed noise range
Noise is listed from 26.5 to 53.7 dB, and sleep mode switches off control-panel lights. Limitation: the manufacturer does not give a separate sleep-mode noise figure, so its minimum is the overall range minimum, not a confirmed sleep reading.
| Model | Minimum noise (dB) | Sleep-mode figure? | Room (m²) | CADR | Lights in sleep | Filter cost/year |
|---|---|---|---|---|---|---|
| Philips AC0820/10 | 19 | Yes | 20 | 190 | Dimmed | — |
| Levoit Core 300S | 22 | Yes | 50 | — | Off | — |
| Levoit Vital 100S | 24 | Conflicting 23/24 dB copy | 20.8 | 243 | Off in darkness | — |
| Blueair Blue Pure 511 | 24–49 range | No published figure | 16 | 123 cfm pollen | — | — |
| Winix Zero Compact | 26.5–53.7 range | No published figure | 50 | 250 | Off | — |
Noise figures come from manufacturer pages; an overall minimum is not the same as a confirmed sleep-mode level. Filter prices are not present in the source pack, so annual filter cost is —.
Common questions
This page cannot give medical advice or establish an asthma benefit. Compare manufacturer filter and airflow specifications, and consult NHS guidance or a healthcare professional for asthma advice.
The published figures in this shortlist range from 19 dB(A) in Philips sleep mode to an overall minimum of 26.5 dB for Winix. A purifier with a fan is not silent; check the mode-specific figure.
This shortlist covers room air purifiers rather than car models. For a vehicle, check that a product is designed for the cabin and review its power and airflow specifications.
Noise depends on the model and fan setting. In the supplied manufacturer data, Philips gives 19 dB(A) in sleep mode; Blueair publishes a 24–49 dB range. Compare like-for-like settings.
The products in this shortlist are air purifiers and the source pack does not identify any as a sound machine. Check each manufacturer’s features if you need both functions.
This shortlist is for household products and does not cover hospital ventilation or infection-control systems. Clinical environments use requirements beyond the domestic specifications shown here.
The supplied manufacturer sources do not define a standard “2/3 rule”. Compare the room size, ceiling height and air changes per hour behind each rating instead.
Pet odours call for a product with an activated-carbon stage and manufacturer information about odour filtration. This quiet-focused shortlist does not rank odour performance; see the pet or smoke list when available.
We compared official manufacturer UK or Europe product specifications for stated room size, CADR, noise and filter details. Gearjury has not physically tested these products. Allergy-related specifications describe filtration and airflow only; they do not promise symptom relief or a medical outcome.
Keep exploring
Compare five air purifiers by manufacturer-published room coverage, particle filtration details and noise. Philips AC0820/10 is a compact-room starting point; no product here promises allergy relief.
The Levoit Vital 100S and WINIX ZERO Compact publish CADR figures in m³/h. We compare five models by manufacturer data, with room-size assumptions and missing costs made clear.
Philips AC0820/10 leads with a 19 dB(A) sleep mode in manufacturer data. Levoit, Blueair and Winix cover other bedroom needs, from small rooms to larger spaces.