Vortex Ceiling Extractor Fan - Guess what? The title of this informative article is just out and out misleading. The sole real "con" when it comes to a ceiling fan is what it takes to get one properly installed. Ceiling fans can be hard to install for the inexperienced do it yourselfer. Sometimes, you will need to run an electrical line to the region where the ceiling fan will be installed. Hiring a competent, bonded and licensed electrician will more than likely save you a lot of grief in the future unless you're adept at doing this kind of thing.
There's also the minor "disadvantage" that involves the problem of periodic care. Correctly installed, a ceiling fan provides many, many years of agreeable cooling and cost-savings in your heating bill (assuming there is a fan that allows one to reverse the blade direction).
On occasion, ceiling fans require small adjustments and get out of balance. The most frequent offenders are loose screws that attach the blades to the motor housing, blades that aren't at exactly the same angle (pitch) as the remaining blades as well as a blade or blades that weigh slightly more compared to the others. Make sure that all the screws are tight without going into great detail. When they aren't tightening the ones that run the fan and have come loose. Your issue continues to be solved if the wobbling has ceased.
If not, make use of a yardstick or other straight piece of wood and put it (together with the fan stopped) vertically at the outer edge of one of the blades. Rotate the blades by hand to make sure that the stick touches. Turn the fan on again and see if you have solved the difficulty.