Tuberculosis or frequently known as TB is a lung disease caused by Mycobacterium Tuberculosis bacteria colonies, this disease is transmitted through the air when a tuberculosis sufferer sneezes, coughs, spits, or even talks, where the air containing the bacteria is inhaled by another person Today Tuberculosis is categorized as a deadly disease for centuries, because tuberculosis has claimed around 1.4 million lives, and because TB has a rapid spread, causes deadly disease, and requires a long time of treatment if someone is exposed to tuberculosis. Therefore TB control is a long-term health problem for humans. During the last 20 years, Indonesia has been ranked number 2 with the most TB sufferers in the world after the Philippines with a prevalence of 756 out of 100,000 people suffering from TB, where the most TB sufferers are in the regions of Sumatra and Java Island, with TB sufferers in Sidoarjo district reaching 2521 people in 2020 Ventilation is one of the things that plays an important role in preventing the transmission of tuberculosis infection in the hospital environment this was also proven in a study conducted by Cronin et al, and Albrer to Franchi that there was transmission of tuberculosis in areas or rooms who have little ventilatiobal though contact with patients has been kept to a minimum accompanied by other preventive measures At RSUD Sidoarjo, tuberculosis patients are treated in the white rose pavilion which is located far from other wards. The pavilion has 6 x 6 inpatient rooms with 3 beds in each treatment room. The inpatient room has adequate air ventilation, because there are several air vents, allowing air exchange in the treatment room, and patients in the treatment room can still get UV light without having to leave the treatment room. In addition, there is a HEPA filter on the ventilator fan and exhaust fan which can prevent the spread of tuberculosis bacteria from the treatment room.

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