A forced-air central heating system is one which uses air as its heat transfer medium. These systems rely on ductwork, vents, and plenums as means of...

Forced-air gas heating systems are used in central air heating/cooling systems for houses. Sometimes the system is referred to as "forced hot air". Gas-fired...

building are divided into mechanical/forced and natural types. The three major functions of heating, ventilation, and air conditioning are interrelated, especially...

As power ratings increase, transformers are often cooled by forced-air cooling, forced-oil cooling, water-cooling, or combinations of these. Large transformers...

is the intentional introduction of outdoor air into a space. Ventilation is mainly used to control indoor air quality by diluting and displacing indoor...

general categories, based on efficiency and design, natural draft, forced-air, forced draft, and condensing. The first category of furnaces is natural draft...

flow of air due to a fire or hot object and the circulation of water in a pot that is heated from below. Forced convection: when a fluid is forced to flow...

air (HEPA) filters and ultraviolet germicidal irradiation (UVGI). Air filter purification traps airborne particles by size exclusion. Air is forced through...

in everyday life, including central heating and air conditioning and in many other machines. Forced convection is often encountered by engineers designing...

cooling including various styles of heat sinks, thermoelectric coolers, forced air systems and fans, heat pipes, and others. In cases of extreme low environmental...

combustion engine, forced induction is where turbocharging or supercharging is used to increase the density of the intake air. Engines without forced induction...

Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity...

An air ioniser (or negative ion generator or Chizhevsky's chandelier) is a device that uses high voltage to ionise (electrically charge) air molecules...

Air conditioning, often abbreviated as A/C (US) or air con (UK), is the process of removing heat from an enclosed space to achieve a more comfortable interior...

unheated forced air can also be used for removing frost and ice, perhaps in conjunction with a subsequent application of deicing fluid. Heated forced air is...

dilution tests (for example, helium dilution test). Forced vital capacity (FVC) is the volume of air that can forcibly be blown out after full inspiration...

Air changes per hour, abbreviated ACPH or ACH, or air change rate is the number of times that the total air volume in a room or space is completely removed...

engine management processes, and electronically controlled fuel injection. Forced air induction by turbocharging and supercharging have increased the power...

steam heat is forced hot air. A furnace burns fuel oil or gas, which heats air in a heat exchanger, and blower fans circulate the warmed air through a network...

accurate than all its predecessors due to a heavier, removable, partially forced-air-cooled barrel with radial cooling ribs and a handle which eliminates the...

A particulate air filter is a device composed of fibrous, or porous materials which removes particulates such as smoke, dust, pollen, mold, viruses and...

SCR circuits employ natural commutation rather than forced commutation. With the addition of forced commutation circuits, SCRs have been used in the types...

publicity. The loans were repaid, but in October 2006, mounting debts forced Air America Radio to file Chapter 11 bankruptcy. The company was bought by...

Aeroméxico Air Algérie airBaltic Air Calédonie Air China Air Creebec Air Dolomiti Air France Air India Air Malta Air Mauritius Air New Zealand Air Serbia Air Tahiti...

contours of the air stream and are forced to embed in one of them directly; this effect increases with diminishing fiber separation and higher air flow velocity...

An air handler, or air handling unit (often abbreviated to AHU), is a device used to regulate and circulate air as part of a heating, ventilating, and...

ventilation, and air conditioning (HVAC) to deliver and remove air. The needed airflows include, for example, supply air, return air, and exhaust air. Ducts commonly...

(also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation...

motors: 11  that are in turn used to drive air conditioners, hot tub/jacuzzi spa pumps, powered gates, large fans or forced-air heat furnaces for example. A "dual...

Forced perspective is a technique that employs optical illusion to make an object appear farther away, closer, larger or smaller than it actually is. It...