The size of the fan you need depends on the size of your room. As a general rule, you should look for a fan with a diameter of at least 12 inches for a small room, and up to 16 inches for a larger room. However the air flow also determines the fan that is required, for instance a 12 inches fan with a powerful motor can have a better air flow than some 16 inches fan.

You should clean your table fan at least once a month to remove any dust or debris that may have accumulated. Follow the manufacturer's instructions for cleaning your specific model, and always make sure to unplug the fan before cleaning it.

The noise level of a table fan can vary depending on the model and the speed setting. Look for a fan with a noise level of 50 decibels (dB) or less to ensure that it is quiet enough to use in a bedroom or other quiet space.