[fruitful_dbox]Numbers of Thai people having allergy is Asia’s no.1 [/fruitful_dbox]Patients with allergies in Thailand are 3-4 times more compared to 10 years ago and steadily increases.

Cause:
The causes of allergies can easily be found in daily life; food, climate, environment, car smoke, etc.

But the main cause of allergy is Air Quality.

From Bangkok AQI data, it was found that the average index of PM2.5 particles is 175 mcg / m³ or µg. / M³, while the standard value should not exceed 50 mcg / m³. Or μg. / M³

Allergy Symptoms:
Cough, chest tightness, shortness of breath, or rapid breathing itching or rash that is usually dry, red, scaly with lymphatic. In digestive system, symptoms are food allergies, vomit, nausea, diarrhea, swelling mouth, abdominal pain, bloating. In respiratory symptoms are asthma or air allergic, skin allergic, such as rashes or hives.

Prevention:
There are several ways of preventions such as regular house cleaning, wearing a dust mask, etc., but another way to prevent allergies is the ventilation system.

Ventilation reduces the amount of dust, moisture and carbon dioxide in the house or building.

Ventilation rates above 0.4 h^-1 or CO₂ below 900 ppm in your home can help prevent the risk of allergies and asthma.

According to (International Journal of Ventilation ISSN 1473-3315 Volume 12 No 2 September 2013)