WD-TURBO roof turbine ventilators cap the exhaust end of
ventilation ductwork or a flue stack.
They spin by the force of wind. By this effect and the specially
designed geometry of the turbine bell vanes, the ventilator
sucks out the air (or flue gas, as the case may be) to the
outside.
The roof turbine ventilators enhance the stack draught effect
and provide protection against ingress of rain, snow and
condensation.
