A ceiling fan can be a good investment for your home. Use in the summer and you will benefit from the blades cooling effect. Operate in the winter and the blades can be reversed to re-circulate warm air.
A fan is installed pretty much the same way as a light fitting but you must ensure the fans blades are not too close to anything. A good guide is to fit approximately 8in from any obstruction, the fan should also be installed at least 7ft 6in from the floor. Ceiling fans are not suitable for installation in a bathroom.