Commercial HVAC systems are often quite different from
industrial applications. In most HVAC installations, the
adjustable frequency drive shares the AC power supply
with sensitive electronic equipment such as computers,
telecommunications networks, lighting and clocks. When
the HVAC system is in an airport, hospital or research facility, the amount of sensitive equipment increases dramatically.
A possible concern in such environments can be harmonic
distortion on the AC power line generated by the adjustable
frequency drive and other electrical equipment.