We are offering energy sever ventilator. provide energy free cooling & fresh air throughout the yearfunctions & performs with the unlimited energy source like wind energysave cost of exhaust fans, wiring, maintenance, etcprovides a safe, cool, healthier & more controlled environmentremove entrapped heat & industrial emissionensure the health of workersdo not require operating timecontinuously work in motion with the windremoves moisture laden air in the winter & extremely hot attic air in the summerspins with the slightest breezecreating an upward draft to draw air out of the atticlocated at the top most point of the roof to give optimum ventilationprevents down draft in to the building allowing air entry from the side openingspleasant looking and enhances architectural looksprevents condensation at the bottom of the roofdesigned to withstand winds in excess of 140 km / hrexhausts hot air due to stack effect even when there is no windsmooth and quiet operation.