Bosch Air 4000, Air Purifier Removes 99.9% of all Pollutants through HEPA13 Air Filter, with Smart Sensor, Auto Mode & Sleep Mode (25 dB (A)), Air Quality Feedback, CADR 300m³/h, up to 62.5 m²

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It’s also worth remembering that, while some machines are quiet on their lowest setting (where they’re often at their least effective), they might be loud on the fastest (where they’re working at their best). Do not spill any liquid on the appliance, to avoid electric shock, fire hazard and/or damage in the internal structure of the filter.

Make sure that the particle sensor is clean and dry (à Chapter 5 “Cleaning and maintenance”, Page 47). A few high-end units double as humidifiers, managing the moisture in the air to prevent dry air causing irritation to the nose, throat, lips and skin. The centrally placed LED touch display is integrated into the slightly angled top and tilts towards the user. Make sure to unplug the appliance when you want to move it, clean it, replace the filter or carry out other maintenance. Key specs – CADR: 240m³/h; Max room size: 20m²; Power settings: 4; Dimensions (WDH): 51 x 19 x 53cm; Weight: 5.

It’s also worth comparing manufacturer figures for the maximum size of room as these can vary enormously, sometimes when the CADR doesn’t. It’s designed to handle large rooms of up to 125m², and combines a pre-filter for large particles with a HEPA filter for dander, dust and smoke, plus a carbon odour filter for smells and VOCs. Do not use the appliance when smoking indoors, have used insecticides, disinfectant, or in places with oily residues, burning incense, or chemical fumes. Hearst UK is the trading name of the National Magazine Company Ltd, 30 Panton Street, Leicester Square, London, SW1Y 4AJ. This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge, if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved.

Read more about the condition New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is applicable). We’re not sure how well that works in practice, but the UA-HD40U-L is impressively efficient at filtering out impurities and very quiet at its automatic and low-power settings. Living with a dust or pollen allergy can turn simple jobs like cleaning into a recipe for sniffs and itchy eyes.Finance options are offered subject to status and credit check which must be completed before commencement of works. At full tilt, it’s as noisy as most rival air purifiers, but in its sleep mode you’d struggle to hear it above ambient sound levels – we measured the output at just 31dBA. Functions Quiet mode: Quiet operation, lighting is off; Automatic mode: Automatic adjustment to air quality; Child lock; Maintenance alarm. Most viruses – and the droplets of mucus and saliva that might contain them – are perfectly capable of filtering particles in the 20- to 500-nanometre range in which you’d find most viruses.