Involute Technologies Pvt Ltd, Khed, MH, India.

A Case Study Epoch HVLS 24-ft Fan By Falco eMotors Inc.

Report No. 032920-01


Problem :

  • Manufactures and distributes engine components. The Company offers gears and shafts for automotive, marine, and industrial sectors

  • The shop  faced problems regarding air movement in the shop, feasibility work of employees.Also during summer, heating of the ceiling of the shop increases temperature at ground level. 

  • As the temperature at the ground level increases, it result in reduce the performance of the employees. 

  • Hence, they are facing the problems to make the employees comfortable.



Solution :

  • Epoch 3.0, 24-ft Fan 04 nos was installed with the following specifications;

    • Motor: Epoch 3.0;

    • Coverage Area: 30,000 Sq. Ft. (2,787S q. m);

    • Speed: 62 RPM;

    • Peak Power: 1.5kW/2.0 hp

  • Epoch 3.0, 24 ft fan is one of the most popular fan with amazing airflow and airflow efficiency.



Site measurement :

A site survey is mandatory before any HVLS fan recommendation. The survey revealed the following dimensions:

  • Total Area: 230 m X 164 m = 37,720‬ Sq. m.
  • Floor to Ceiling Distance: 35 to 40 ft,
  • By a rule of thumb distance/1.5 gives us the approximate fan diameter. 
  • In this case, we chose to go with a 24-ft fan.



Fan and Coverage Area Slide Needed :


Power Consumption report: 

Three test reports are collected for each fan installation as follows:

  1. Power Consumption Report;
  2. Input Current Report;
  3. Air Flow Report.

Those reports are shown for this site:



Power consumption report captures the real as well as apparent power. Epoch HVLS fans are the only fans in the world to have active power factor correction and unity power factor. Therefore the Watts (Real Power) and VARs (the apparent power) are almost the same. The power has been captured at 22, 32, 42, 52 and 62 RPM. Power drawn at those speeds are 118, 210, 398, 750, 1070W respectively. The chart above also shows trend lines generated using Excel for real and apparent power to take into account any measurement errors as fan power consumption can be modeled by well known equations.

Input Current @240V, 1-Phase input :


The input current is also measured at 22, 32, 42, 52 and 62 RPM. Input current is recorded as  0.89, 1.02, 1.93, 3.15, and 5.11A respectively. The input voltage varied from 230 to 240V during the measurement.

Air flow report :


The airflow is measured from the center of the fan and is recorded at every 3-ft distance. Values were recorded upto 30-ft from the center of the fan. The values were respectively, 190, 269, 285, 326, 418, 405, 375, 348, 259, 275 ft/min at distances of 3,6,9,12,15,18,21,24,27 and 30-ft respectively.

Estimated Yearly Savings (USD) :


Epoch 24-ft fan was compared against Indian HVLS fan Manufacturer. Based on their data sheet, daily, monthly and yearly power consumption and costs were calculated. An Epoch HVLS fan will save the end user anywhere from $1,975 to $8,639 per year over any competitive brands because of its unique technology.

Completed Installation :


Above is the picture of the finished installation.