Is the VFD hiding a dirty filter?
Polar Dynamix experts explain how variable frequency drives can mask dirty filter problems in HVAC systems. Clogged filters increase energy demand, but VFDs may hide this signal from operators.
Can a VFD hide a dirty filter in my HVAC system?
HVAC technicians may be misdiagnosing or overlooking dirty filters in VFD-equipped systems, leading to higher energy use and equipment wear for their clients.
Key takeaways
- VFDs can mask the energy spike that usually signals a clogged filter in HVAC systems.
- Dirty filters increase energy demand, but VFD-equipped systems may not show obvious warning signs.
- Technicians should not rely solely on energy readings when diagnosing filter condition.
- A modelling study by Polar Dynamix was used to illustrate the filter-VFD relationship.
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