Roof Mounted Wind Turbine Ventilators

These ultra quiet, energy-saving roof whirly vents draw heat out of buildings (especially in summer) and reduce condensation (especially in winter). They are very effective air-conditioners which Mother Nature pays to operate. Our roof vents provide AFFORDABLE and EXTREMELY effective cooling (and fresh air) for every kind of permanent and temporary building. They only need the lightest of breezes and/or a venturi to run super effectively. They do NOT need electricity and COST absolutely NOTHING to run.
ditoriums and other bui

ings15 YEARS QUALITY WARRANTY !!!!!!!!!!!!