Axial fans: stand fans, floor and table fans, ceiling fans as well as hand fans and USB fans.
Tangential fans: tower fans
However, their actual purpose is to cool the air. However, no device can really lower the air temperature. Fans merely circulate the air, creating wind in the room. This causes the fan to blow away from you the surrounding layer of air that has been heated and moistened by sweat. Your skin cools down and you experience a pleasant and refreshing feeling.
As soon as you buy a fan with 30 decibels, you can assume that you will find a quiet environment during operation. At a volume rating of 60 decibels, the fan develops a noticeable background noise that you may find very annoying after a short time.
This rotary motion of the fan ensures that the device covers a much larger area and the whole room is supplied with air circulation.
Furthermore, I recommend that you do not sit in the direct air stream of the fan. This can cause your skin temperature to drop and the muscles underneath to cool down and tense up. This usually leads to a stiff neck or neck pain.
Furthermore, the mucous membranes of your respiratory tract can dry out. In most cases, this makes you more susceptible to bacteria, which can lead to cold symptoms.
In addition, a fan also uses human sweat, which is produced on your skin when the temperature is high. Sweat in combination with a breeze also ensures that you feel a cooling effect, although the actual room temperature does not drop.
Of course, there's a risk of overheating or a cable burning, but that's the same with any other electrical appliance, such as your TV.
Let's assume the electricity price is 30 cents per kilowatt hour, the fan has a power of 75 watts and you use it eight hours a day. This results in the following calculation:
75 watts x 8 hours = 600 watt-hours
600 watt hours = 0.6 kilowatt hours (kWh)
0.6 kWh x 0.30 Euro = 0.18 Euro
Of course, for smaller areas, such as your desk space environment, the airflow may be less.
Fans rated at 1,000 cubic feet per hour will provide downright gale force winds to blow stacks of paper off your desk.