| Term | Definition |
|---|
| VA | Volt amperes.
|
| Vapor | The gaseous product of evaporation.
|
| Vaporization | The change from liquid or solid phase to the vapor phase.
|
| Velocity Pressure | The measure of the kinetic energy of a fluid.
|
| Vent | An opening in a vessel or other enclosed space for the removal of gas or vapor.
|
| Vertical Firing | An arrangement of a burner such that air and fuel are discharged into the furnace in practically a vertical direction.
|
| Viscosity | Measure of the internal friction of a fluid or its resistance to flow.
|
| Volatile Matter | Those products given off by a material as gas or vapor, determined by definite prescribed methods.
|
| Volume of Air | The number of cu ft of air per min expressed at fan outlet conditions.
|
