People with chronic respiratory illnesses, such as asthma or chronic obstructive pulmonary disease (COPD), can use air conditioning, but proper usage is key. Continuous air conditioner use all day in an enclosed environment, without appropriate temperature and humidity control, can exacerbate symptoms. Cold, dry, and poorly circulated air can trigger respiratory conditions.

Dr. Hanh explains respiratory conditions to a patient during an examination. Photo: Tam Anh General Clinic District 7

For individuals with asthma, COPD, or chronic rhinosinusitis, the cold, dry airflow from an air conditioner can lead to airway constriction, increased mucus secretion, coughing, wheezing, or shortness of breath. Spending extended periods in a closed room also allows dust, bacteria, and mold to accumulate if the unit is not cleaned regularly. This increases the risk of exacerbations, especially in those with an allergic predisposition.

Prolonged hot weather increases the body's oxygen demand, causing fatigue and worsening respiratory symptoms. The most crucial principle when using an air conditioner is maintaining a stable room temperature, ideally between 26-28 degrees Celsius. This temperature should not differ significantly from the outside, helping to minimize airway irritation. Patients should avoid directing cold air streams toward their face or chest. Additionally, humidifying the room can help prevent dry mucous membranes.

Regular air conditioner cleaning is also recommended. Dirty filters can harbor bacteria, mold, and allergens, increasing the risk of respiratory tract inflammation. Therefore, the unit requires frequent cleaning, particularly during hot seasons when usage is high.

Avoid staying in an air-conditioned room continuously all day without air exchange. Opening room doors or windows periodically helps circulate air and reduces the accumulation of irritants. Patients also need to drink enough water to prevent respiratory tract dryness.

If symptoms such as increased coughing, dry throat, shortness of breath, or nasal congestion appear while using an air conditioner, adjust your usage or temporarily discontinue it. If the condition does not improve, patients should seek medical examination at a hospital.

Dr. Nguyen Thi My Hanh

Department of General Internal Medicine

Tam Anh General Clinic District 7