Indoor Air Quality inside Smoking Rooms with Air Conditioning. Case study : smoking rooms in public areas

Abstract Indoor air quality is influenced by chemicals substances from within the room and external factors. Smoking room with air conditioning in a coffee shop is an attractive choice for smokers even though room users rarely understand the actual room air quality conditions. The research aims to evaluate the potential decrease in indoor air quality for smoking room equipped with air conditioning in coffee shops. The study was conducted at 2 coffee shops in Surakarta, Indonesia by measuring air quality parameters, including PM2.5, PM10, and the CO2 concentration produced by cigarette smoke, the particulate meter was placed in the smoking room, and the open space around the coffee shop, measurements were carried out for 3 days in a row at the same time each day. The data collected is analyzed using multiple linear regression methods. The results of the research showed that the indoor air quality of smokers with air conditioning has higher particulate concentrations of PM2.5, PM10, and CO2 above air quality standards set by Indonesian ministry of health. The results of the research are recommendations for improving air quality, considering alternative design solutions, such as using smoke suckers and improved ventilation designs in coffee shops that provide smoking rooms with air conditioning.