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.
Pascal or PASCAL may refer to:
Pascal is a French and an Italian surname.
Pascal is a patronymic surname that derives from the personal given name Pascal, from Latin Paschalis. In France Pascal is especially found in the Southern-Eastern area, in Rhône-Alpes and Provence-Alpes-Côte d'Azur, while in Italy Pascal is found in Northern-Western area, in Piedmont, Aosta Valley and the variant De Pascal in Friuli-Venezia Giulia.
Pascal is a common masculine Francophone given name, cognate of Italian name Pasquale, Spanish name Pascual, Catalan name Pasqual.
Pascal is common in French-speaking countries, Germany and the Netherlands. Derived feminine forms include Pascale, Pascalle or Pascalina. Pascal is also common as a surname in France, and in Italy (in Piedmont, Aosta Valley and, as De Pascal, in Friuli-Venezia Giulia).
Pascal derives from the Latin paschalis or pashalis, which means "relating to Easter", from the Latin term for "Easter", pascha, Greek Πάσχα, from the Aramaic pasḥā (Hebrew pesach) "Passover" (since the Hebrew holiday Passover coincides closely with the later Christian holiday of Easter, the Latin word came to be used for both occasions). The Christian given name is in origin from the meaning "one born on Easter day", or "born on Pentecost" (see below).
Variations of the given name include: Paschal, Pasqual, Pasquale, Paskal, Pascoal, Pascale, Pascha, Paschalis, Pascual, Pascoe and Pasco.