As we believe in fair business policy & long term professional relationship, we do not misguide our customers by promising them false results & misguiding values of exhaust capacity of our WINDSPIN - Turbine Roof Ventilators. We are the only one to have tested & certified our product with one of the leading renewable energy institute SARDAR PATEL RENEWABLE ENERGY & RESEARCH INSTITUTE (SPRERI) based at Vallabhvidyanagar, GUJARAT.