Air cleaner

Air cleaner is a device that removes contaminants (impurities) from a stream of gas or air. Solid... More >>

Air conditioning

Air conditioning controls the temperature, moisture, cleanliness, and movement of indoor air. It... More >>

Boiler

Boiler is a metal vessel inside which water is heated. At one time, most boilers changed water... More >>

Dehumidifier

Dehumidifier, dee hyoo MIHD uh fy uhr, is a device that removes moisture from the air.... More >>

Fuel

Fuel is a material that provides useful energy. Fuels are used to heat and cool buildings, cook... More >>

Furnace

Furnace is a device in which heat is produced. Some furnaces heat the air in people's homes.... More >>

Gorrie, John

Gorrie, GOR ee, John (1803-1855), an American physician, invented the first machine for... More >>

Heat pipe

Heat pipe is a device that transfers large amounts of heat from one place to another with only... More >>

Heat pump

Heat pump is a device that takes heat from one area and delivers it to another area at a higher... More >>

Heating

Heating is the supplying of heat to a building, vehicle, or other enclosure to make the occupants... More >>

Humidifier

Humidifier, hyoo MIHD uh fy uhr, is a device that increases the amount of moisture in indoor air... More >>

Radiator

Radiator is a set of pipes or tubes that gives off heat to its surroundings. Steam or hot-water... More >>

Refrigeration

Refrigeration is the process of producing low temperatures. It takes place when heat is removed... More >>

Safety valve

Safety valve is a device used in various mechanical systems to relieve pressure. Such systems... More >>

Thermostat

Thermostat, THUR muh stat, is a device that helps control the temperature of an indoor area or of... More >>