A fan with a mister or a misting fan, as they are called, is often seen during the hot summer days. It is popularly used to cool down temperatures at outdoor events such as barbeque parties or football games. The area around the misting fan can be up to 40oF lower than the actual temperature depending on the type of misting fan used. It is also used at greenhouses to provide the necessary temperature for the plants. Aside from this, the high humidity brought by the mist gives plants extra moisture for them to grow properly.
How does it work?
The misting fan releases a mist of water through the spray nozzle. The water droplets are so small that most of them evaporate right away. As this happens, the surrounding hot air interacts with the mist where there is heat transfer from the hot air to the cooler mist. This transfer of heat is what evaporates the mist and is responsible for the cooler temperatures. On the other hand, the fan circulates the surrounding air and provides a breeze. Together with the mister, the fan directs the path of the mist which allows it to cool wider areas.
- Low electricity cost – Air conditioners rely heavily in electricity to cool down the air. With misting fans, the only thing that would require electricity is the fan and the water pumps needed in generating the right water pressure. The electricity consumption of the misting fan is only a little bit over what a normal fan would use.
- Less toxic – The misting fan only uses water to cool down the air. It does not use toxic refrigerants such as CFC’s to do so. Toxic refrigerants are dangerous to the environment and other living things when handled during replacement. Water, on the other hand, is non-toxic unless the water source is contaminated with chemicals.
- Easy maintenance – The two working parts, the fan and the mister, are easy to clean. Simple repairs can be done by home owners since the parts are easily disassembled. When damaged beyond repair, replacements for the two are less expensive than air conditioning units and are available in many stores.
- Corrosion – Water and metal do not go hand in hand especially when humidity is high. Corrosion may set in not only to the misting fan but also to other metal containing materials that come into contact with the mist.
- Mosquitoes – If water becomes stagnant in the misting fans, it can become a breeding ground for mosquitoes and other water breeding insects. Mosquitoes can easily maneuver around the tiny holes and crooks of the fan and lay their eggs on the stagnant water. This problem is a possible health threat to the public since many mosquito borne diseases are life threatening.
- Waterborne bacterial diseases – Legionella is a bacteria that thrives in water. If the water source of the misting fan is contaminated with the said bacteria, it can easily transfer to foods or drinks when the mist drops to them. Legionella is the bacteria responsible for Legionnaire’s disease and Pontiac fever.
Many worry that the mist sprayed by the misting fan may completely wet clothes and even destroy other electronic materials. However, this will not be the case if the proper spray nozzle is used and the proper pressure is applied. There may be a few water droplets big enough to put visible marks on clothes but they won’t be able to completely drench clothes.
Overall, a fan equipped with a mister is a greener alternative to air conditioning units. They are non-toxic and are also great energy savers. Besides, they are generally cheaper to buy. Operation and maintenance cost is also relatively lower compared to other cooling systems. There are different types of misting fans to choose from. Buy a high pressure misting fan for commercial use while a low pressure misting fan is perfect for household use.