Arvind Smart Textile Limited, India.

Arvind Smart Textile Limited, India.

A Case Study : Epoch HVLS 24-ft Fan By Falco eMotors Inc.
Report No. 041520-01

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Key Facts


  • Direct Drive PMSM Motor;
  • Lowest Weight;
  • Active Power Factor Corrected;


  • Industrial


  • India.


  1. Arvind Smart Textile Limited has a one of the manufacturing plant in Ranchi, India where Garments are manufactured.

  2. There is a lot of people working because of garment manufacturing. Workers suffer from heat because the company's shed is made up from steel.

  3. The company shed is compact on all sides, so there is no air movement in the shop.

  4. Air movement is very important for physical comfort.

  5. To make the workers physically and mentally comfort, Management decided to install HVLS fans in the shop


  • Epoch 3.0, 24-ft Fan was installed with the following specifications ;
    • Motor: Epoch 3.0;
    • Coverage Area: 30000 Sq. Ft. (2787 Sq. m);
    • Speed: 62 RPM;
    • Peak Power: 1.5kW/2 hp;
  • Epoch 3.0, 24 ft fans are most popular with amazing airflow and airflow efficiency.

Site Survey

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

  • Total Area: 233 ft X 213 ft = 49,629 Sq. ft.
  • 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.

Site Measurements

Fans and coverage area

Test Reports

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

Power Consumption Report

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, 188, 390, 720, 1152 W 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 Report

The input current is also measured at 22, 32, 42, 52 and 62 RPM. Input current is recorded as 0.57, 0.72, 1.93, 3.15, and 5.11 A 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 27-ft from the center of the fan. The values were respectively, 215, 295, 334, 490, 510, 492, 413, 393, and 334 ft/min at distances of 3,6,9,12,15,18,21,24, and 27-ft respectively.

Finished Installation

This is the video of the finished installation.