You’re more likely to know Acer for its PCs, laptops or monitors, but its foray into air purifiers shows a lot of promise. The Pro P2 is a mid-sized tower – just under 58cm tall – with the top accommodating the fan’s grille, the minimal controls, and a 1.5in square OLED colour screen. The latter gives you the current PM2.5 reading, plus an at-a-glance air quality indicator, with the text turning from green through amber to magenta as it worsens. The HoMedics stays quiet at its lowest two settings, but noise levels ramp up on its highest setting to around 54.1dB, making it louder than some larger models. It uses between 16W and 34W while in use. Performance is in line with other small purifiers, taking just over four minutes to bring our PM2.5 particulates down to safe levels from a high of 387 micrograms per square metre. However, with a HEPA filter, a carbon odour filter, an ioniser and UV-C treatment to combat germs, the HoMedics has a more robust set of air treatment features than other purifiers in its class. It’s affordable, but not at all basic. Features: The powerful airflow can also clean the entire room with maximum range, and the quiet operation does not affect the air supply effect. Speed settings. Most air purifiers have a choice of speeds so you can keep it lower for sleeping and turn it up when the pollen count is high. A night mode can also help if you want a quiet setting and dimmer lights while you sleep, although we found this doesn’t always work as well as you’d hope.

It’s one of the best-looking air purifiers you can get, but the real attraction is the lifespan of the German-made filters, which can last up to 12 months depending on use. The device reminds you when they’re in need of replacement. Another nice feature is an intelligent auto mode, which senses how much pollution is in the room and chooses appropriately from its five speed settings.

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Key specs – CADR: 240m³/h; Max room size: 20m²; Power settings: 4; Dimensions (WDH): 51 x 19 x 53cm; Weight: 5.9kg; Filter replacement indicator: Yes; Warranty: 1 year

By comparison, your typical kitchen fridge consumes about 3 to 5 times as much energy. Running an air purifier constantly draws about as much energy off the grid as your smartphone charger. 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. Spending more will get you something quieter with more power, but this is a decent little purifier for a small lounge, home office or bedroom if you’re working on a similarly sized budget. 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 yearsVery little compared to other household appliances. Electric heaters and dehumidifiers tend to draw 1,000 to 2,000 Watts but household air purifiers draw just 20-30W, costing you around 2p per hour at current (June 2023) prices. However, these can rise steeply with extra functions: “Those that have heating, cooling and dehumidifier functions will use much more energy than a standard filter unit,” Matt Thomas says. Airpurtech has been specializing in air purification (air purifiers, filters, fans, etc.) for over 30 years. Our sales network is all over the world, mainly in the United States, Europe, Southeast Asia and other regions.

With the average cost of just 8p per day of electricity cost to have an air purifier running, we think you will agree that is a very small price to pay to have constantly pure air circulating in the space you live and breathe. The biggest impact is on cardiovascular and respiratory health but there is evidence that air pollution can have widespread effects,” she says. “Exposure to air pollution during pregnancy, for instance, is linked to low birth weights and pre-term births. Particulate matter associated with road traffic has also been found on the placenta.” A Swiss manufacturer we’d not come across before, Stadler Form launched their first product, the odd-looking Fred humidifier, in 1998 and now produce high-quality fans, heaters, dehumidifiers and air purifiers. Our favourite is this one, Roger Little (there’s also a Roger Big for 104m 2 rooms and plain old Roger for 66m 2 rooms).Most people are pleasantly surprised when they invest in a quality air purifier. Because it can improve the air environment for the whole family, remove all kinds of bacteria in the air, prevent people from inhaling them, and make the home life of parents and children better. So if you have the Zona 620 which has a CADR of 620 at max fan speed and runs at 50 watts – you have a CADR per watt rate of 15.5 which is excellent efficiency. Generally the average CADR per watt rate is around 5 or less.