- Air Flow – the movement of air through a building
- Air Handler – a component in an HVAC system that circulates air
- Air Purifier – a device that removes pollutants from the air
- Capacitor – a component in an HVAC system that stores electrical energy
- Circuit Breaker – a component in an HVAC system that protects against electrical overload
- Compressor – a component in an air conditioner that increases the pressure of refrigerant
- Contactor – a component in an HVAC system that controls the flow of electricity
- Dampers – devices that control the flow of air within an HVAC system
- Dehumidifier – a device that removes moisture from the air
- Ductless Mini-Split System – an air conditioner that does not use ductwork
- Electrical Wiring – wires used to connect electrical components in an HVAC system
- Filters – devices that remove pollutants from the air
- Filtration System – a system that removes pollutants from the air
- Forced Air System – a heating and cooling system that uses air to distribute heat
- Fuse – a component in an HVAC system that protects against electrical overloads
- Gas Piping – pipes used to supply gas to a furnace
- Grills – covers for registers
- Heat Pump – a device that can both heat and cool a building
- Humidifier – a device that adds moisture to the air
- Insulation – materials used to prevent heat loss in a building
- Overload Protector – a component in an HVAC system that protects against electrical overloads
- Plenum – a space within an HVAC system that distributes air
- Radiant Heating System – a heating system that uses hot water or electricity to warm a building
- Registers – openings in a building where air enters or exits
- Relay – a component in an HVAC system that controls the flow of electricity
- Return Air Duct – a duct that carries air from a building back to the HVAC system
- Return Plenum – a plenum that carries air back to the HVAC system
- Supply Air Duct – a duct that carries air from the HVAC system to a building
- Supply Plenum – a plenum that carries air from the HVAC system to a building
- Static Pressure – the pressure of air within an HVAC system
- Subcooling – the amount of heat removed from refrigerant in a liquid form
- Superheat – the amount of heat added to refrigerant in a vapor form
- Thermodynamics – the study of heat and temperature
- Thermistor – a device that measures temperature
- Thermostat Wiring – wires used to connect a thermostat to an HVAC system
- Transformer – a component in an HVAC system that converts electrical energy
- Ventilation – the process of exchanging indoor air with outdoor air
- Zone Control System – a system that allows you to control the temperature in different parts of a building
