HEPA filters are designed to filter the air by trapping 99.9% of airborne particles, such as dust, pollen, and tobacco smoke. HEPA stands for High Efficiency Particulate Air (filter).
A lens may be the most important part of a camera, because it forms and focuses photographic images. A filter, affixed in front of a camera lens, can help protect the lens from damage.
A clean, white HEPA filter is displayed horizontally on a bright yellow background. Used in air conditioners, vacuum cleaners, and air purifying machines, HEPA filters ensure that the air is clean by removing bacteria and impurities.
Sunlight filters through a sliding glass door and many-paned window into a home gym. The home gym has equipment for building strength and muscle and burning calories, including a rack of free weights, a weight machine, and a stationary bicycle.
Patio furniture comprising four wooden chairs and a wooden table sits waiting to be occupied. The sun from above filters onto the patio, highlighting fall foliage colors of red, gold, and green.
More hotels are adding air purifiers and filters to their guest rooms, either because the outside air is prone to smoke or pollution, or because guests demand them for health reasons.
Shivani Vora. New York Times. Tue, 12 Feb 2019 17:04:52 GMT.
GOTHENBURG, Neb. (AP) - An economic development organization says it's under contract to buy the former Baldwin Filters plant in Gothenburg and attract another employer to the city. Gothenburg Improvement Co. ...
Washington Times. Mon, 28 Jan 2019 06:49:47 -0500.