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 is an object that emits heat.
Heater may also refer to:
In electronics:
In music:
In other fields:
Targetmaster is a subline of the Transformers toyline that include Nebulan sidekicks who can transform into the Transformers' weapons.
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.
Alena may refer to:
Alena is a variant of Helen (given name). People with this name include:
Alena is a 1947 Czechoslovak comedy film, directed by Miroslav Cikán. It stars Miluse Zoubková, Vladimír Repa, and Terezie Brzková.
Encantadia is a Filipino fantasy television series (locally known as telefantasya) produced by GMA Network. It was dubbed as the grandest, most ambitious, and most expensive production for Philippine television during its time of release. The pilot episode was aired on May 2, 2005. Its last episode was aired on December 9 of the same year to give way to its second book, Etheria. This series aired its pilot episode on December 12, and its last episode on February 18, 2006. The third and latest installment of the Encantadia saga, entitled Encantadia: Pag-ibig Hanggang Wakas, aired its pilot on February 20, 2006 and the series ended on April 28, 2006.
The series garnered both popular and critical recognition at home and abroad, including winning the 2005 Teleserye (Television Series) of the Year at the Los Angeles-based Gawad Amerika Awards.
The entire Encantadia saga is currently aired on Fox Filipino.
Encantadia is a term coined from the Filipino words "enkanto", "enkanta", "enkantada", or "enkantado" (which was in turn derived from the Spanish term encant(ad){o/a}) which means enchanted beings endowed with supernatural powers.