HVAC

HVAC (heating, ventilating, and air conditioning; also heating, ventilation, and air conditioning) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, (heating,ventilating and air-conditioning & Refrigeration) or ventilating is dropped as in HACR (such as the designation of HACR-rated circuit breakers).

HVAC is important in the design of medium to large industrial and office buildings such as skyscrapers, onboard vessels, and in marine environments such as aquariums, where safe and healthy building conditions are regulated with respect to temperature and humidity, using fresh air from outdoors.

Ventilating or ventilation (the V in HVAC) is the process of "exchanging" or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, and carbon dioxide. Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air.

Heater (disambiguation)

Heater is an object that emits heat.

Heater may also refer to:

In electronics:

  • Vacuum tube filament for an indirectly heated cathode
  • In music:

  • Heater (Muttonbirds song), a song by The Mutton Birds
  • Heater (Samim song), a song by Samim
  • Heaters, a song on the IllScarlett album Clearly in Another Fine Mess
  • In other fields:

  • Handgun, in American slang (mid-20th century)
  • Danny Heater, basketball record holder
  • Heater shield, a type of shield
  • Heating element
  • Slang term for a fastball pitch in baseball
  • Military slang for an infrared-guided air-to-air missile
  • a cigar.
  • Targetmaster

    Targetmaster is a subline of the Transformers toyline that include Nebulan sidekicks who can transform into the Transformers' weapons.

    1987 Targetmasters

    The first Targetmasters assortment, released in 1987, included six new characters, and five existing ones from the 1986 line, whose toys were slightly remolded with larger peg holes to hold their new weapons, as well as an additional peg hole for each remold to mount its weapon in vehicle mode. In 2003, one of the two Japanese-exclusive Targetmasters from 1987 was added to the Autobot ranks. Unfortunately, the Targetmaster weapon he shares with Decepticon Cyclonus, also share names. To further add to the confusion, the printed names of Stepper and Artfire's weapon/partners in Japan are swapped. Cyclonus's partner Nightstick is called Nebulon (the name Fracas is erroneously given on Scourge's box) and paired with Stepper. Scourge's partner Fracas is called Nightstick and paired with Artfire.

    The smaller Targetmaster partners were easily lost making them highly collectable and demand high prices on the secondary market.

    Haze

    Haze is traditionally an atmospheric phenomenon where dust, smoke and other dry particles obscure the clarity of the sky. The World Meteorological Organization manual of codes includes a classification of horizontal obscuration into categories of fog, ice fog, steam fog, mist, haze, smoke, volcanic ash, dust, sand and snow. Sources for haze particles include farming (ploughing in dry weather), traffic, industry, and wildfires.

    Seen from afar (e.g. approaching airplane) and depending upon the direction of view with respect to the sun, haze may appear brownish or bluish, while mist tends to be bluish-grey. Whereas haze often is thought of as a phenomenon of dry air, mist formation is a phenomenon of humid air. However, haze particles may act as condensation nuclei for the subsequent formation of mist droplets; such forms of haze are known as "wet haze."

    The term "haze", in meteorological literature, generally is used to denote visibility-reducing aerosols of the wet type. Such aerosols commonly arise from complex chemical reactions that occur as sulfur dioxide gases emitted during combustion are converted into small droplets of sulphuric acid. The reactions are enhanced in the presence of sunlight, high relative humidity, and stagnant air flow. A small component of wet haze aerosols appear to be derived from compounds released by trees, such as terpenes. For all these reasons, wet haze tends to be primarily a warm-season phenomenon. Large areas of haze covering many thousands of kilometers may be produced under favorable conditions each summer.

    Haze (disambiguation)

    Haze may refer to:

  • Haze, atmospheric condition
  • Haze machine, device used in the entertainment industry to simulate the atmospheric condition
  • Turbidity (or haze), the cloudiness of a fluid or transparent solids, such as glass or plastic, as measured by the percentage of light that is deflected or attenuated
  • Visual appearance (optics, visual perception), scattering of light out of the regular direction during reflection or transmission
  • Corneal opacification (known as haze), central corneal opacification is a diagnostic "danger sign" in red eye (medicine)
  • Hazing, a practice of harassment and initiation
  • Haze may also refer to:

    In films

  • Haze (2005 film), a 2005 Japanese thriller film written and directed by Shinya Tsukamoto
  • Haze (2010 film), a 2010 Turkish film
  • In gaming

  • Haze (video game), PlayStation 3 video game developed by Free Radical Design
  • In music

  • Haze (band), progressive rock band
  • "Haze" (song), song by nu-metal band Korn for the video game, Haze
  • In literature

  • Dolores Haze is the character after whose nickname Vladimir Nabokov's novel Lolita is named.
  • Haze (2005 film)

    Haze (HAZE ヘイズ) is a 2005 Japanese thriller/horror film written and directed by Shinya Tsukamoto who also stars in the movie. After appearances at several international festivals in 2005, the film debuted theatrically in Japan on March 4, 2006. Two versions of the film exist: the original release, a short 25 minute version; and what Director Tsukamoto entitled the "Long Version", which runs 49 minutes.

    Plot synopsis

    A man wakes up in a small concrete space bleeding from the abdomen. He can barely move and has no recollection of why or how he came to be there. Crawling forward he eventually meets a woman and they try to piece together their past lives.

    Cast

  • Shinya Tsukamoto
  • Kaori Fujii (藤井かほり)
  • Takahiro Murase (村瀬貴洋)
  • Takahiro Kandaka (神高貴宏)
  • Masato Tsujioka
  • Mao Saito (さいとう真央)
  • Film Festivals

    Listed chronologically:

  • Jeonju International Film Festival (April 28, 2005)
  • New York Film Festival (October 1, 2005)
  • Lyon Asiexpo Film Festival (November 12, 2005)
  • FilmAsia Festival (December 3, 2005, www.filmasia.cz)
  • Podcasts:

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