Latest News:  
Beijing   Overcast/Thundershower    27 / 20 ℃  City Forecast

English>>Life & Culture

Be aware of air conditioning pollution

(People's Daily Online)

10:31, August 14, 2012

(Yangcheng Evening News)

Air conditioning is the essential in the hot summer for daily life and work. However, improper use of air conditioning has become the main reason of indoor air pollution.

Air conditioning pollution may cause respiratory tract infections

Air conditioning pollution refers to the pollutants generated or accumulated in the air conditioning unit that can jeopardize people’s health. They gain access to the indoor environment through the air conditioning’s ventilating system. A variety of pollutants can survive in the air conditioning system and they are divided into physical, chemical and biological pollutants according to their nature. The biological pollutants, including bacteria, fungi, pathogenic bacteria, viruses and mites, can accumulate in the air conditioning system and can also multiply in fan coil unit and heat sinks where the environment is suitable for their growth. These pollutants can be extremely hazardous to health.

Air conditioning pollution can cause dozens of diseases harmful to human health, mainly causing respiratory tract infections such as Legionnaires' disease, the most common respiratory tract infection caused by Legionella. Allergic diseases such as allergic rhinitis, asthma and extrinsic allergic alveolitis are also common problems.

Dust can easily accumulate in filter screens and heat sinks

Air conditioning filter screens and especially heat sinks are vulnerable to the accumulation of dust. The heat sinks in air conditioning units are found where the cold and hot air interchanges. When the air conditioning is running, the humid environment and appropriate temperature produced by condensation, coupled with dust accumulated in the heat sink, can provide an ideal living condition for bacteria, viruses and other microorganisms to multiply rapidly. When turning on the air conditioning, these pollutants are blown into the room, causing a negative impact on human health. When cleaning air conditioning units, the heat sinks are usually ignored, causing hidden dangers from indoor air pollution.

Air conditioning units should be cleaned yearly before use

Experts suggest that air conditioning units should be cleaned every year before use and once every two months afterwards. The air supply outlet, filter screen and also heat sinks should be washed. Normally, the heat sink can be difficult to take apart, so the general and simple method of wiping and cleaning is not usable. Special air conditioning disinfectant can be purchase for cleaning in this case. In addition, a large number of microorganisms can be found on the heat sink, so people should use only authorized air conditioning disinfectant to ensure the bacteria are properly exterminated.

Open doors and windows to maintain ventilation when cleaning air conditioning units

After cleaning, the air conditioning units should be left in a properly ventilated area for 20 minutes to avoid secondary indoor air pollution.

Read the Chinese version: 夏日当心空调污染

Source:People's Daily Overseas Edition , author: Dai Changfang and Gu Shaohong.


Leave your comment0 comments

  1. Name


Selections for you

  1. Frontier defense company in training

  2. Iran quake toll hits more than 300

  3. World trade faces downside risks

  4. Award-winning inkstick designer in E China

  5. Ariadne Artiles beautiful Spanish fashion model

  6. Tang Wei models for jewelry designed by herself

Most Popular


  1. Asian slowdown leaves Europe pondering
  2. Be wary of Japan’s radical acts on Diaoyu
  3. Editorial: Stable but slower growth
  4. Firms should watch out for Internet threats
  5. Why have people lost trust in data and indices?
  6. Money chase likely to continue in U.S. eletions
  7. Real estate rebounds as buyers return
  8. Editorial: Outbound investment risks
  9. Don’t be overwhelmed by domestic issues
  10. US pushes China to get serious about sanctions

What's happening in China

Olympic champions' statues idea sparks debate

  1. Haikui damage estimated at 1.46 bln yuan
  2. China to continue Internet crime crackdown
  3. Typhoons leave 51 Chinese dead, 21 missing
  4. Traffic resumes on landslide-hit W China railway
  5. Fugitive fraud suspect surrenders to police

China Features

  1. Boxing in China II: A Tale of Two Decades
  2. Fortune 500 Chinese companies not strong
  3. Why Hollywood favores China's actresses?
  4. Dongfeng Honda to recall 76,000 CR-Vs
  5. How to protect yourself during heavy rainstorms?

PD Online Data

  1. Spring Festival
  2. Chinese ethnic odyssey
  3. Yangge in Shaanxi
  4. Gaoqiao in Northern China
  5. The drum dance in Ansai