Not all HVLS fans are created equal and are not the same. When it comes to performance, look for:
- Maximum Cubic Feet per Minute (CFM)
- Efficiency Cubic Feet per Minute per Watt (CFM/W)
- coverage area in square feet
- dBA at Maximum RPM (needs to be less than 85 dBA; the rate at which long or repeated exposure to sound can cause hearing loss)