How quiet or noisy is the fan? Many fans are noisy.
An electrical humming created when a ceiling fan is running is usually the result of poor engineering design and a lack of precision manufacturing. Some manufacturers use generic, inexpensive ball bearings to reduce cost, even though these are a common source of operating noise. A lack of proper dampening between metal parts can also create and intensify noise, as can the use of extra thin sheet metal motor and mounting system parts.
