In relation to an HVAC system, what does VPN stand for?

VPN stands for "Volt Amps per Nominal." In HVAC systems, this term is commonly used to describe the apparent power in a circuit, which is the product of voltage and current in an AC system. It reflects the total power that is used by the system including both the active and reactive components.

The reason this is important in the context of HVAC is that it helps technicians understand the power requirements of different components within the system, aiding in proper sizing and load calculations. By being aware of the volt-amps per nominal, technicians can ensure that the power supply adequately supports the HVAC equipment, preventing issues related to under or overloading the system. Understanding the electrical demands also assists in troubleshooting and optimizing system performance.