While record heat wave hits everyday, people usually mind going out and just stay in front of the air conditioner. They complain of the symptoms similar to a cold. The symptoms include the swollen your hands and feet, xerophthalmia, sore throat, headache, indigestion. Those diseases are called Legionnaires Disease air-conditioningitis.

 Legionnaires are caused by terribly different temperature between a refrigerated room and muggy weather outside. Given the circumstances, it can cause many health problems. It results in autonomic nervous system dysfunction.

 To prevent this, first, frequently open the windows to let fresh air in. When you don’t this for  air-conditioning, the indoor becomes an enclosed space that the concentration of hazardous materials is increased. So you have to air out for 5 minutes once every two hours to circulate dry, stuffy air.

Second, Clean air filters for air conditioning periodically once in one or two weeks. The cooling water from air conditioning contaminated by germs called ‘legionella‘ can infect with people.  As it lives in the condenser, It might be spread all over the building. It is important to cleanliness of condenser.

Lastly, Keep your body warm  and Take a rest. Please drink water or Hot tea for keeping suitable body temperature. It can be also helped to aim an air blast of air conditioner at where there aren't many people. Also, prepare long sleeves not to  directly reach cool air of air conditioner.