Air purifiers use different kinds of filters to do their job – usually, a large, washable, reusable pre-filter to collect bigger particles, plus a finer filter, which is usually a disposable high-efficiency particulate air (HEPA) filter. The length of time this lasts varies, but on average expect it to need replacing every six months (or fewer if you use the machine less). It’s the HEPA filter that catches all the tiny airborne nasties, and these are capable of catching particles as small as 0.3 microns, which is more than three times smaller than a cigarette smoke particle. LOW NOISE MODE - With three speed settings that can be selected easily from the intuitive touch control panel, you can adjust air filtration to suit any room. The low noise setting is perfect for undisturbed sleep. It’s really designed for small spaces of around 10m², but we found its performance better than the 80m³/h CADR might imply. Spraying antiperspirant into a small room with the purifier at maximum speed, the Clean Air Compact brought PM2.5 particulates down to safe levels within three minutes and six seconds. At that speed it’s fairly noisy, with sound levels reaching around 48dBA, but in general use the lowest setting will be fine, and this takes the noise levels down to 36.2dBA, where the sound is noticeable but hardly aggravating. Levoit’s Core 300S is an elegant, compact purifier with all the latest features. Like the Princess Smart Air Purifier, it’s Wi-Fi and app enabled, hooking up to the third-party VeSync app for remote control, air quality monitoring, and scheduling operation. You can set it to turn on and off at specific times, set the mode and power settings, even set whether the display should turn on or stay off. If you’d rather go completely hands-free altogether, you can also control the Core 300S through Alexa or Google Assistant voice commands.

It’s just as good as an air purifier too, though its CADR rating is slightly below that of the purifier-only Pro P2. In tests, it took PM2.5 levels from a maximum 411 micrograms per square metre to 25 in 135 seconds, bringing it down to double figures in just over a minute. Again like the Pro P2, it’s quiet, with the noise barely noticeable at the lowest speed in purifier mode. Left on Smart mode, with the front-facing display turned off, all but the lightest sleepers should be able to sleep through.

The CADR aims to provide an objective measure of the effectiveness of a portable air purifier at dealing with different types of allergens. A purifier with a score of 250 for dust particles is as effective as adding 250 cubic feet of clean air per minute. Buyers should focus on the results of the specific pollutant they’re aiming to eradicate, whether that’s pollen, smoke or dust, and many manufacturers will supply CADR figures for the most common. Scottish Highlands & Islands postcodes: AB, FK, HS, IV, KA, KW, PA, PH, ZE, LL58-LL78, IM, TR, PO30-41 Please be aware that we currently cannot arrange for delivery of this product to the following postcodes: AB, FK, HS, IV, KA, KW, PA, PH, ZE, LL58-LL78, IM, TR, BT, PO30-41. LED Display and Lighting– Cleaner air is made simple with this easy-to-use air purifier. This model offers a timer option for 2, 4 or 8 hours, giving you complete control. It also features colour-changing LED lighting to suit any setting.

The best air purifiers for mid-sized rooms 1. Sharp UA-HD50U-L: Best purifier and humidifier for mid-sized rooms CLEAN AIR PRO - This compact model is perfect for small to medium rooms up to 14m², such as your home office, bedroom or living space. The sleek, contemporary body is designed to fit seamlessly into your surroundings. Some purifiers have a built-in timer. This can be really useful if you want your machine to come on a few hours before you get home, or if you want to turn it off automatically at night. Noise is another factor – you don’t want to replace one irritation (allergies) with another (the sound of a jet plane in your room). For many, the hum is something that doesn’t bother them, but some purifiers can get very noisy. 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). An air-quality sensor, which enables the machine to switch itself on when the air quality becomes poorer, can be useful. After all, you can’t see when the air quality dips, for example, as the result of a high pollen count.Otherwise, this has the same advantages as the smaller version: effective three-stage filtering, a built-in humidifying function and Sharp’s Plasmacluster ion technology, which – while it sounds like a weapon from a Halo game – works to kill odours, bacteria and mould. While the Vax PureAir 300 gives you even more airflow and covers larger rooms for less, the Sharp hits a sweet spot for price, performance and features, making it a great mid-range purifier for mid-sized rooms. With an intuitive touch control panel and three speed settings, it's simple to operate and easy to adjust the air filtration to suit any room. The LED display offers a timer option for 2, 4 or 8 hours, as well as a handy Filter Change Reminder. There’s even a night mode to dim the LED display and slow down the fan speed, so you can enjoy uninterrupted sleep while purifying the air around you. This is not intended to be a full statement of your rights under the Consumer Contracts Regulations. Full details of your rights are available from your Local Authority’s Trading Standards Office. How To Return A Product What about a carry handle? These are handy if you need to move it from room to room. Wheels, a compact design and a low weight won’t go amiss here, either.

Please note some larger products are delivered to kerb-side (the street outside your home), it is at the drivers discretion if they can deliver the item to another location on the property. YEAR GUARANTEE - We've got you covered. Register your product for a free 2 year guarantee and total peace of mind. Key specs – CADR: 280m³/h; Max room size: 35m²; Power settings: 4; Dimensions (WDH): 25 x 25 x 45cm; Weight: 3.8kg; Filter replacement indicator: Yes; Warranty: 2 yearsFilter replacement indicators aren’t crucial and not all air purifiers have them, but this is a helpful feature as a clogged air cleaner won’t work properly. CLEAN AIR COMPACT - This compact model is perfect for small rooms up to 10m², such as your home office, bedroom or living space. The sleek, contemporary body is designed to fit seamlessly into your surroundings. 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.