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  2. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Under the pre-2015 standard, a 75 US gal (280 L; 62 imp gal) gas storage water heater with a nominal input of 22 kW (75,000 BTU/h) or less was able to have an energy factor as low as 53%, while under the 2015 standard, the minimum energy factor for a 75-US-gallon gas storage tank water heater is now 74%, which can only be achieved by using ...

  3. Plumbing - Wikipedia

    en.wikipedia.org/wiki/Plumbing

    sewage systems and septic systems with or without hot water heat recycling and graywater recovery and treatment systems; Rainwater, surface, and subsurface water drainage; fuel gas piping; hydronics, i.e. heating and cooling systems using water to transport thermal energy, as in district heating systems, like for example the New York City steam ...

  4. Plumber - Wikipedia

    en.wikipedia.org/wiki/Plumber

    Plumbing work is defined in the Australian Standards (AS3500) Regulations 2013 and refers to any operation, work or process in connection with installation, removal, demolition, replacement, alteration, maintenance or repair to the system of pipes and fixtures that conveys clean water into and liquid waste out of a building.

  5. Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania

    The state also has a tied record for the largest hunter shot black bear in the Boone and Crockett record books at 733 lb (332 kg) and a skull of 23 3/16, tied with a bear shot in California in 1993. [204] As of 2007, Pennsylvania has the second-highest number of Boone and Crockett-recorded record black bears at 183, behind Wisconsin's 299. [204]

  6. Arizona - Wikipedia

    en.wikipedia.org/wiki/Arizona

    Arizona [b] is a state in the Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah.It also borders Nevada to the northwest and California to the west, and shares an international border with the Mexican states of Sonora and Baja California to the south and southwest.

  7. Ballast tank - Wikipedia

    en.wikipedia.org/wiki/Ballast_tank

    Cross section of a vessel with a single ballast tank at the bottom. A ballast tank is a compartment within a boat, ship or other floating structure that holds water, which is used as ballast to provide hydrostatic stability for a vessel, to reduce or control buoyancy, as in a submarine, to correct trim or list, to provide a more even load distribution along the hull to reduce structural ...

  8. California - Wikipedia

    en.wikipedia.org/wiki/California

    California (/ ˌ k æ l ɪ ˈ f ɔːr n j ə /) is a state in the Western region of the United States that lies on the Pacific Coast.It borders Oregon to the north, Nevada and Arizona to the east, and shares an international border with the Mexican state of Baja California to the south.

  9. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Variable refrigerant flow systems when compared with central plant cooling from an air handler, eliminate the need for large cool air ducts, air handlers, and chillers; instead cool refrigerant is transported through much smaller pipes to the indoor units in the spaces to be conditioned, thus allowing for less space above dropped ceilings and a ...