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Air conditioning refers to the cooling and dehumidification of indoor air for thermal comfort.
Attic ventilators are in houses, screened opening provided to ventilate an attic space. They are located in the soffit area as inlet ventilators and in the gable end or along the ridge as outlet ventilators. They can also consist of power-driven fans used as an exhaust system.
CNC (computer numerical control) refers specifically to a computer "controller" that reads instructions and drives the machine tool.
Compressor is a vapor pump that pumps vapor (refrigerant or air) from one pressure level to a higher pressure level.
Conduit, electrical, is a pipe, usually metal, in which wire is installed.
Control systems are devices or set of devices to manage, command, direct or regulate the behavior of other devices or systems.
General contractor is a group or individual that contracts with another organization or individual (the owner) for the construction, renovation or demolition of a building, road or other structure.
Heat is energy that causes molecules to be in motion and to raise the temperature of a substance.
Humidistat may be used to control either humidifying or dehumidifying equipment by the regulation of electric or pneumatic switches, valves, or dampers.
HVAC (pronounced either "H-V-A-C" or "H-vak") is an acronym that stands for heating, ventilating, and air conditioning.
Natural gas is a fossil fuel formed over millions of years from dead vegetation and animals that were deposited or washed deep into the earth.
Pipefitter (also called steamfitter), is a tradesman who lays out, assembles, fabricates, maintains and repairs piping systems.
Piping is a system of pipes used to convey fluids (liquids and gases) from one location to another.
Piping design studies the efficient transport of fluid.
Plumbing is a piping system that constitutes the form of fluid transportation that is used to provide potable water and fuels to people’s homes and business.
Pneumatics is the use of pressurized gas to affect mechanical motion.
Pump is a device that forces fluids through a system.
Temperature is a word used to describe the level of heat of molecular activity.
Thermocouple is a device made of two unlike metals that generates electricity when there is a difference in temperature from one end to the other. Thermocouples have a hot and cold junction.
Thermostat is a device for regulating the temperature of a system so that the system's temperature is maintained near a desired set point temperature.
Valve is a device used to control fluid flow.
Ventilation is the intentional movement of air from outside a building to the inside. It is the V in HVAC.
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