Note: These replacement intervals are intended as guidelines only. Performance of any filter media is dependent upon the concentration of contaminants going through the system. High concentrations of contaminants such as dust, pet dander, and smoke will reduce the useful performance of the filters. Levoit Core 400s: Our runner up for medium-sized spaces. It's the most expensive medium-sized air purifier we tested but it offers great performance in all test categories. Features include Wi-Fi connectivity, voice control and the VeSync app, which allows you to monitor air quality and control the unit remotely. It's also compatible with Google Assistant and Alexa. When operated with the odor reducing pre-filter. It is recommended to always use the pre-filter when operating this air purifier. This product does not reduce or adsorb carbon monoxide gas. Make sure gas appliances are well ventilated. If you’re looking for ways to keep your house smelling fresh, you might want to read our guides to the best diffusers and best scented candles. Levoit Core Mini: The tiniest and most affordable of the bunch, which is great considering it has a 3-stage filtration system and you can even add essential oils for aromatherapy. Bottom of the table performance, unfortunately.

Some air purifiers, including the Coway Airmega 400, are designed to purify rooms as large as 1,500 square feet. David Priest/CNET Budget HEPA Filtration: this home air purifier helps capture up to 99.97% of the following microscopic airborne allergens and particles: dust, pollen, pet dander, dust mite debris and smoke. 1 The CADR rate measures how much air is filtered in cubic metres per hour (m 3ph) of clean, purified air produced. The higher the CADR rating, the cleaner the air in the room will become. As a rule, if the square root of the CADR rating matches the floor area of the room – eg 625m 3ph in a 25m 2 room – it is an excellent air purifier. Three-quarters is good and half is acceptable. You may see CADR measured in cubic feet per hour on American devices, but the maths is the same.

According to the US Environmental Protection Agency, some of these microscopic solids and liquid droplets, which can be made up of hundreds of different chemicals, are so tiny that it's almost inevitable to inhale them. PM10 and PM2.5, which are particles of less than 10 and 2.5 micrometers in diameter, respectively, pose the greatest risk to human health since once inhaled, they allocate deep into the lungs and even into the bloodstream, impairing the proper functionality of the lungs and heart. The Honeywell HPA100 Air Purifier has earned the ENERGY STAR label by meeting strict energy efficient guidelines set by the U.S. EPA. Room air purifiers have demonstrated the potential for improving air quality and providing health benefits. EPA does not endorse manufacturer claims regarding the degree to which a specific product will produce healthier indoor air. This air purifier for allergies is AHAM (Association of Home Appliance Manufacturers) Verifide meaning that it has been independently tested to ensure its efficiency in reducing smoke, dust and pollen in the suggested room size. (extra large room air purifier) The AHAM assigns a CADR (Clean Air Delivery Rate) Rating that measures the volume of filtered air delivered by an air cleaner. The Honeywell HPA5300 InSight™ HEPA Air Purifier received the following CADR Rating: It’s speed makes it ideal for living rooms and bedrooms and it can be wall-hung to save space,” says Matt Thomas of John Lewis. This is because, rather than drawing in air from behind, it draws it from a ring around its front surface. There is also a ring of coloured light all round it, which changes from green to red according to the air quality levels. In smart mode it adjusts its power accordingly.

Smoke Reducing S Filter is designed to remove smoke odors from cigarettes, cigars, wildfire smoke, fireplaces, and wood burning stoves. When considering your budget for an air purifier, you might also want to consider the cost of replacing the filter roughly every six months. Types of air purifierThis portable air purifier uses an activated carbon pre-filter that helps capture large airborne particles and reduce odors and VOCs.

CleanForce CP-Rainbow: I was impressed by the performance of this unit. It was the fastest air purifier at removing particles at high fan setting, removing all smoke particles in just 1 minute and 45 seconds, which is just incredible. It comes with app control and voice command, an HD LED display for air quality monitoring and color-coded indicators. It offers just a hair fewer features than our winner for best air purifiers for large spaces, but it's considerably more expensive, which is why it's not topping the list. Why are people suddenly scrambling to get their hands on the best air purifiers? Poor air quality can lead to a range of health complaints. The problem is particularly acute in our cities: poor air quality outside can cause poor air quality indoors. 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.” In addition, many will include active carbon filters to remove traffic fumes, cigarette smoke and volatile organic compounds (VOCs) from people, animals, plants and products in our house. The carbon is treated to have an extremely high surface area – it’s ultra-porous – attracting small particles to it and trapping them. Active carbon filters are known for removing bad smells. Where to place an air purifier Good air quality is particularly hard to maintain in large and open spaces. For this category, the most consistent unit was the Kenmore Smart 2000e. At low, it was able to purify the air in our test chamber in approximately 6.25 minutes, the fastest of the bunch. At high, it came in second, reaching the finish line in only 2.5 minutes.If the fan is set to its highest, the Dimplex can wipe out the pollutants and smells in your room in just 15 minutes. Handy if you’ve just been cooking. At its lowest setting, it’s very quiet – albeit not as quiet as the Blueair – and there’s a night mode that turns off all its lights until daybreak. 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. Cleaning Levels (Microscopic Particles, General Clean, Pollen and Turbo) make this an excellent air purifier for allergies Carbon Pre-Filter helps remove odors and gases from the air, such as those from cooking, smoking, and pets.