Although "220V AC Cooling Fan" of the blade section curve is caused by the same foundation, various adjustments can be carried out also are limited within a certain range, but still with a fan manufacturers have made great improvements proposed a very unique design. Because of the improved "220V AC Cooling Fan" fan designed mostly related to changes in frame design, the next frame design combined together introduction. Fan is a fan frame sizes determine the specific installation and degree of difficulty. "220V AC Cooling Fan" frame the distinctive design without violating accepted standards, along with bringing users to install, easy to use process feeling considerate.