“…Studies indicate a direct relationship between certain concentrations of air pollutants with indoor health problems, such as: allergies, asthma, bronchitis, pneumonia, lung cancer, etc. [(Deloach, 2004), (Craig, 2003), ( Health Canada Modern approaches to managing indoor air problems have been outlined in numerous publications, with some examples including the World Health Organization's air quality guidelines, Health Canada's exposure guidelines for residential air quality in residential buildings, the US National Standards Institute, and the American Society of Health , The indoor environment consists of five main factors: thermal comfort, indoor air quality, acoustic control, odor control, and visual comfort (Abbaszadeh et al, 2006;Angelova, 2016;Asadi et al, 2017). These factors are cumulative in nature and interrelated in their function, temperature, relative humidity, carbon dioxide and number of occupants significantly affecting the indoor air quality of a healthcare facility (Beggs et al, 2015;Wan et al, 2011).…”