II. ROOFTOP VENTILATOR
Rooftop ventilators are generally implemented on the roofs
of industries, workshops, ware houses etc. for ventilation
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c 2016 IEEE
purposes. They do not require electricity for its working.
Being an eco-friendly green product. It helps in reducing the
carbon footprint and aid in energy savings. They are virtually
maintenance free. They do not create any noise during its
operation and are leak and rain proof. It removes hot air in
summer and moisture laden air in winter from the interior of
the buildings.
Rooftop ventilators rotate due to two principles. First is that
the air flows from high temperature area to low temperature
area or from high pressure area to low pressure area. Second
is due to the slight breeze that exist in the surroundings.
Figure 1 shows a typical Rooftop ventilator and Figure 2 gives
a pictorial description of the advantages of rooftop ventilators
during summer and winter seasons (Source: Technical sheet
of Windmaster Tornado Turbine Roof Ventilator for Domestic
Ventilation).