Dryers that don’t dry, vacuum cleaners that don’t clean, and air conditioners that don’t cool might be plagued by the same problem: a clogged or dirty filter. To keep many appliances in tip ...

While the main filter of an air purifier is neither washable nor reusable, Liu says that the pre-filter, if your air purifier has one, can be machine-washed. 1. Turn off and unplug the air purifier.

However, attributes like the pitch and tone of the fan noise, efficacy of the automatic air-quality sensors, the ease of cleaning pre-filters, and how it looks in a home environment are difficult ...

sterile fans around the bathrooms (after accounting for rates of air flow and exposure times). Retrofitting the dryers with HEPA filters reduced the germ count about four-fold. A unique ripple in ...