INDOOR AIR QUALITY
According to the American Association of Allergy Experts, the occurrence and spread of diseases is caused by 50% of the poor indoor air quality. According to this source, the loss in labor productivity is 4% due to poor weather quality, and every year 60 billion dollars of labor-related losses occur.
In Europe, the mortality rate was 0.3% due to post-operative contamination in hospitals, but was reduced to 0.15% as a result of improvements. A British-Scandinavian research group carried out researches in 19 hospitals, hip and knee surgeries for 5 years. When 1 m3 of airborne particles were 400, the infection rate was 4.5% and the number of particles was reduced to 20% and this rate decreased to 1.5%.
In Germany alone, in about 500 explosions and fires that have resulted in the deaths of 60 people to this day, the cause has been recorded in the firefighting statistics as "dust accumulated in the air ducts".
As a result of the measurements, it was observed that the dirt layer of 1 mm on the surface of the heating/cooling coil reduces heat transfer by approximately 10%. In other words, the energy consumption required to achieve the same thermal efficiency should be increased by 10%.
According to the EPA, indoor levels of dust mites are higher than outdoor levels. According to AAFA, (the Asthma and Allergy Foundation of America) dust mites may be the most common trigger of year-round allergies and asthma.