What are the Hazards of Air Conditioning and how does Centralized Air Conditioning affect your health?

Whether it is in the hot summer or the bitter winter, staying in the air-conditioned room is very comfortable all the time. But have you ever thought about whether your body can bear it if you stay for a long time? For example, if you don’t have a cold, but you feel dizzy, headache, tired, emotionally unstable, or cough, runny nose and other symptoms, but after a day or two or leave the air-conditioned room, it will soon get better.

Microclimate
The places where centralized air conditioners are used are basically relatively closed indoor environments. It is generally believed that an indoor temperature of 20 to 30°C and a relative humidity of 30% to 70% are beneficial to health. Centralized air conditioning can directly affect indoor temperature and humidity. When the humidity is higher than 70%, people can feel chest tightness, and when the humidity is lower than 30%, it can cause dry skin and mucous membranes, resulting in dry mouth and tongue. At the same time, due to poor ventilation, the indoor air gradually becomes dirty, and long-term activities in this environment will cause people to experience dizziness, nausea and other discomfort.

Positive and negative ions
Studies have shown that negative ions are beneficial to health. After exposure to high concentrations of negative ions, some people will experience physiological and biochemical changes in their bodies, resulting in a relaxing effect, reducing tension and headaches, and improving alertness and shortening reaction time. People who spend a long time in an air-conditioned room often feel dizzy, fatigued and other conscious symptoms, which are actually related to the decrease of negative ion concentration. Because the negative ions are captured by air-conditioning filters and dust in the air, some of them are adsorbed on the positively charged surface.

Human body’s stress response to hot and cold environments
The body’s body temperature regulation in hot and cold environments mainly relies on physiological mechanisms, followed by behavior. Young people have better tolerance to cold and heat than the elderly. The body temperature regulation system of infants and young children is still in the developmental stage, and the ability to regulate heat is very poor. Therefore, when the temperature difference between the inside and outside of the air-conditioned room is large or it is in an air-conditioned environment for a long time, it is easy to cause some people with poor adaptability to the environmental temperature difference, such as the elderly, children, or patients with cardiopulmonary disease, to experience discomfort or induce diseases.

Chemical pollutants and SBS
SBS is also called poor building syndrome. It is due to the low exchange rate of indoor and outdoor air and the accumulation of indoor air pollutants, which leads to a decline in air quality, so that people who are active in the environment have eye, nose, throat and upper respiratory tract irritation, dry skin, headache, fatigue, and lethargy , General malaise, low work efficiency and other non-specific symptoms, and after leaving the environment, the symptoms can be relieved or subsided. In closed rooms with centralized air-conditioning, if mechanical ventilation is insufficient, the concentration of carbon dioxide is usually high, harmful exhaust gases such as cigarettes, and gaseous pollutants from indoor decoration accumulate. This syndrome is more common, causing dizziness, headache, eye discomfort, and so on. Discomfort such as dry throat.

Whether it is in the hot summer or the bitter winter, staying in the air-conditioned room is very comfortable all the time. But have you ever thought about whether your body can bear it if you stay for a long time? For example, if you don’t have a cold, but you feel dizzy, headache, tired, emotionally unstable, or cough, runny nose and other symptoms, but after a day or two or leave the air-conditioned room, it will soon get better.

Microbial contamination and disease
Biological pollution is common in centralized air conditioning systems and general indoor environments, including bacteria, fungi, viruses, rickettsia, parasites, and by-products or toxins produced by organisms. After the central air conditioner is used for a long time, the blown air contains a lot of dust, bacteria and fungi. People who have been active in this environment for a long time are susceptible to “air conditioning disease”, which not only causes disorders of the respiratory system, but also aggravates the original conditions, such as coronary heart disease, high blood pressure, and asthma. People with allergies sometimes have a runny nose, sneeze, and cough as soon as they enter an air-conditioned room.