KNOW WHY THESE EQUIPMENTS ARE USED ON THE ROOF OF FACTORIES??

 You might have seen this type of rotating equipment on the roof of factories.In this article we will discuss what is this,what is does and how it works.

These are known as roof extractors. 

In summers, high temperatures build up inside small workshops and factory units making them extremely unpleasant to work in. As a temporary measure portable fans are installed to provide relief for workers, however while portable fans cool small areas of the building, the rest remains stiflingly hot.

Roof extractor fans provide a simple, low cost method of cooling for small buildings or rooms of upto approximately 1400 cubic meter (50,000 cubic feet).

It provides ventilation, fresh air and remove stale or contaminated air.Hot air is exhausted from the building and cooler outside air is sucked in though open doors and windows. As a result the temperature inside the building is held close to the outside temperature.

Using roof extractor fans to cool buildings of upto 1400 cubic meter has proved to be a very cost effective. By rapidly removing hot air from the building and sucking cooler air in through open doors and windows, the temperature inside can be kept close to the ambient (outdoor) temperature.