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  2. 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 .

  3. Household Air Conditioning Unit Doubles As Water Heater

    techcrunch.com/.../12/air-conditioning-water-heater

    At its peak, the ACWH can provide 18,000 BTU, or 1.5 tons of cooling using 1333 watts per hour. Heating water while cooling a building can help save energy, since the heat recovery process eases ...

  4. Ceramic water filter - Wikipedia

    en.wikipedia.org/wiki/Ceramic_water_filter

    Ceramic water filter. Ceramic water filters ( CWF) are an inexpensive and effective type of water filter that rely on the small pore size of ceramic material to filter dirt, debris, and bacteria out of water. This makes them ideal for use in developing countries, [1] and portable ceramic filters are commonly used in backpacking.

  5. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    Reverse osmosis ( RO) is a water purification process that uses a semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions. RO can remove dissolved or suspended chemical species as well as biological substances (principally bacteria ), and is used ...

  6. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Water softening. Idealized image of water softening process involving replacement of calcium ions in water with sodium ions donated by a cation-exchange resin. Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is ...

  7. Best Buy’s new recycling program will let you mail in your ...

    www.engadget.com/best-buys-new-recycling-program...

    But you’ll need to pay $23 or $30 for a box. Best Buy announced today that it’s extending its gadget recycling program to include a new mail-in option. The retailer will now sell you a box for ...

  8. Watt - Wikipedia

    en.wikipedia.org/wiki/Watt

    The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m 2 ⋅s −3. [ 1][ 2][ 3] It is used to quantify the rate of energy transfer. The watt is named in honor of James Watt (1736–1819), an 18th-century Scottish inventor, mechanical engineer, and chemist who ...

  9. A VR massage chair made me both happy and sad - Engadget

    www.engadget.com/2016-09-03-a-vr-massage-chair...

    Updated Sat, Sep 3, 2016 · 3 min read. One of the delights on show here at IFA was Medisana's VR massage chair, which pairs one of its high end devices with an Oculus Rift. Rather than sitting in ...

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