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2. The best air purifier for 2024 - Engadget

   www.engadget.com/best-air-purifier-120040002.html

   The Core 400S claims a half-hour air exchange rate for a 1,000-square-foot room and combines the three main filter types — pre-filter, activated carbon and particle — into a single ring ...

3. The 5 best cordless vacuums for 2024 - Engadget

   www.engadget.com/best-cordless-vacuum-130007125.html

   The Shark is a solid vacuum with a self-emptying base,in the same price range. But the Pure One S15 Pet has stronger suction and did a better job cleaning up big messes. It’s also worth noting ...

4. Water filter - Wikipedia

   en.wikipedia.org/wiki/Water_filter

   A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .

5. Ultrasonic cleaning - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic_cleaning

   Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US gal), to large industrial units with volumes approaching 1,000 litres (260 US gal).

6. Backwashing (water treatment) - Wikipedia

   en.wikipedia.org/wiki/Backwashing_(water_treatment)

   Backwashing is a form of preventive maintenance so that the filter media can be reused. In water treatment plants, backwashing can be an automated process that is run by local programmable logic controllers (PLCs). The backwash cycle is triggered after a set time interval, when the filter effluent turbidity is greater than a treatment guideline ...

7. The best accessories for your new OLED TV - Engadget

   www.engadget.com/oled-tv-accessory-guide...

   And if you own Philips Hue smart lights, you should consider the Ambiance LightStrip Plus. Hue lights can also work with the company's HDMI box, which can synchronize your lighting with the images ...