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  2. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    A refrigerator, commonly fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [ 1]

  3. Air ioniser - Wikipedia

    en.wikipedia.org/wiki/Air_ioniser

    An air ioniser (or negative ion generator or Chizhevsky's chandelier) is a device that uses high voltage to ionise (electrically charge) air molecules. Negative ions, or anions, are particles with one or more extra electrons, conferring a net negative charge to the particle. Cations are positive ions missing one or more electrons, resulting in ...

  4. Refrigeration - Wikipedia

    en.wikipedia.org/wiki/Refrigeration

    Refrigeration is any of various types of cooling of a space, substance, or system to lower and/or maintain its temperature below the ambient one (while the removed heat is ejected to a place of higher temperature). [ 1][ 2] Refrigeration is an artificial, or human-made, cooling method. [ 1][ 2] Refrigeration refers to the process by which ...

  5. 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 ...

  6. Mila hands-on: Much smarter (and pricier) than your average ...

    www.engadget.com/mila-smart-air-purifier-hands...

    Additionally, there’s a White Noise Mode that adjusts the rhythm of the oscillating fans to mimic soothing sounds (Chasing Waterfalls, for example, is equivalent to 2.7 air changes an hour ...

  7. Air purifier - Wikipedia

    en.wikipedia.org/wiki/Air_purifier

    The noise levels for most purifiers can vary and may be dependent on fan speed. [36] Frequency of filter replacement and electrical consumption are the major operation costs for any purifier. There are many types of filters; some can be cleaned by water, by hand or by vacuum cleaner, while others need to be replaced every few months or years. [37]

  8. Iron-oxidizing bacteria - Wikipedia

    en.wikipedia.org/wiki/Iron-oxidizing_bacteria

    Iron filters have been used to treat iron bacteria. Iron filters are similar in appearance and size to conventional water softeners but contain beds of media that have mild oxidizing power. As the iron-bearing water is passed through the bed, any soluble ferrous iron is converted to the insoluble ferric state and then filtered from the water.

  9. These popular glass storage containers are 40% off: 'I like ...

    www.aol.com/lifestyle/these-popular-glass...

    YouCopia StoraLid Food Container Lid Organizer. $20. This popular problem-solver has five adjustable dividers so you can neatly organize your lids by size, shape or however you'd like. No more ...

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