As it needs be installed on the roof, we make a separate cover to prevent rainwater from entering the room and
make concaved pedestal for easy installation. It is made of steel, the wings are axial,
the covers are made of aluminum, F.R.P. Different type of wings are used such as turbo, multi-wing, and aerofoil depending
on their use. Roof type ventillator is installed on roofs of chemical plants, coal mines, food plant, casting placts,
textile mils, and theaters to remove odors, heat and dust.