Fitted with all usual EC features, such as tacho output (speed sensor), and easy speed controllability by 0-10VDC signal or PWM.
If you were to compare an EC fan against a similar size AC fan, R315L (AC) vs R315G (EC). The AC version has a power consumption (at free air) of 0.317kwa and the EC 0,194kwa. The AC version is also slightly more powerful (max air 1750m³/h / max pressure 700Pa) than the EC (1500m³/h max / 640Pa Max).
If both fans are operated in a typical commercial application, operating point 900m³/h at 300Pa.
The fan will operate at full speed during 8 hours per day and run at half speed the rest of the time, 50 weeks per year, 7 days per week.
The table below shows the cost to operate each fan. You can see that the EC version is more cost effective making a yearly saving of £139.99, that is a 49% saving on the comparative AC version.