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  2. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Free cooling systems can have very high efficiencies, and are sometimes combined with seasonal thermal energy storage so that the cold of winter can be used for summer air conditioning. Common storage mediums are deep aquifers or a natural underground rock mass accessed via a cluster of small-diameter, heat-exchanger-equipped boreholes.

  3. Recycling codes - Wikipedia

    en.wikipedia.org/wiki/Recycling_codes

    Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.

  4. 8 easy craft projects to recycle old Christmas cards

    www.aol.com/news/8-creative-ways-upcycle-old...

    Rather than just throwing your Christmas greeting cards away, why not upcycle or recycle the cards into new decorations, bookmarks, gift tags and more. 8 easy craft projects to recycle old ...

  5. Sheet Metal and Air Conditioning Contractors' National ...

    en.wikipedia.org/wiki/Sheet_Metal_and_Air...

    The Sheet Metal and Air Conditioning Contractors' National Association (SMACNA; pronounced 'Smack'-'Nah') is an international trade association with more than 4,500 contributing contractor members [1] in 103 chapters [2] throughout the United States, Canada, Australia and Brazil.

  6. AOL Mail

    mail.aol.com

    You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563. Should you need additional assistance we have experts available around the clock at 800-730-2563.

  7. Recycling in the United States - Wikipedia

    en.wikipedia.org/wiki/Recycling_in_the_United_States

    Recycling materials waiting to be barged away on the Chicago River Trash and recycle bin at George Bush Intercontinental Airport. Recycling statistics (ca. 2014) [16] with similar numbers as of 2015 [17] An average of approximately 258 million tons of trash is generated by the United States in 2014 34.6% was recycled; 12.8% was combusted for ...

  8. Business card - Wikipedia

    en.wikipedia.org/wiki/Business_card

    An attorney's business card, 1895 Eugène Chigot, post impressionist painter, business card 1890s A business card from Richard Nixon's first Congressional campaign, in 1946 Front and back sides of a business card in Vietnam, 2008 A Oscar Friedheim card cutting and scoring machine from 1889, capable of producing up to 100,000 visiting and business cards a day

  9. Refrigerant reclamation - Wikipedia

    en.wikipedia.org/wiki/Refrigerant_reclamation

    Reclamation of used refrigerant by an EPA-certified reclaimer is required in order to sell used refrigerant not originating from and intended for use with motor vehicle air conditioners and stationary equipment like air conditioners, refrigerators, central air conditioning systems (HVAC), and other cooling equipment.