Philips PureProtect Mini 900 Series Smart review
A compact purifier focused strongly on particle and allergen filtration, with HEPA NanoProtect, active carbon, automatic sensing and smart control.

£159.99 direct from Amazon UK at time of writing
Our verdict
Our Best for Allergies pick. Philips specifies HEPA NanoProtect with an active-carbon stage and a PM2.5 sensor, which is the combination we look for when airborne pollen, dust and pet dander are the main concern.
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Who it suits
- Households concerned about airborne pollen, dust and pet dander
- Buyers wanting a compact machine with a real particle-filtration specification
- Bedrooms where a low minimum noise level matters
- People who want voice or app control
Room size and airflow
Philips states a maximum room size of 65 m² alongside a 250 m³/h CADR. The CADR sits between compact and large-room machines, so we would treat 65 m² as an upper limit under Philips' own methodology rather than a like-for-like comparison with other brands.
Filtration
HEPA NanoProtect handles fine airborne particles including pollen and pet dander, active carbon addresses odours and certain gases, and a pre-filter extends the life of both. We describe what the filters capture; we make no health or medical claims.
Noise and everyday use
A stated 20.5 dB minimum with a dedicated sleep mode makes this comfortable to run overnight in a bedroom.
Running and ownership costs
Philips recommends replacing the filter around once a year in typical use, which is the main ownership cost alongside modest electricity use in auto mode.
Full specifications
- CADR
- 250 m³/h (manufacturer stated)
- Maximum room size
- 65 m² (Philips methodology)
- Filtration
- HEPA NanoProtect, active carbon, pre-filter
- Sensor
- PM2.5
- Connectivity
- Wi-Fi, Google and Alexa voice control
- Minimum sound
- 20.5 dB
- Sleep mode
- Yes
- Filter life
- Around one year (recommended)
Specifications as published by the manufacturer. Coverage figures use each manufacturer's own air-change assumptions and are not directly comparable between brands.
Strengths
- Strong published filtration specification for the size
- 20.5 dB minimum sound suits bedroom use
- Wi-Fi plus voice control through Google and Alexa
Considerations
- The 65 m² figure uses Philips' own air-change assumptions
- Filters are model-specific and add an annual cost
- Amazon listings for the 900 series include non-smart variants
Our view
We selected the PureProtect Mini 900 Smart as our allergies pick because its published filtration specification is the most relevant on this list for airborne allergens, in a body small enough for a bedroom.
Alternatives worth comparing

BEST OVERALL
Levoit Core 400S Smart Air Purifier
A powerful smart all-rounder with 400m³/h CADR, automatic air-quality sensing and app control. A particularly strong choice for larger living spaces and households wanting one purifier to cover several everyday needs.
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BEST FOR PETS & ODOURS
Blueair Blue 511i Max
A compact smart purifier with both particle and carbon filtration, making it particularly useful where pet dander and household odours need tackling together.
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