Will hotel bathroom heater ventilation system spread viruses?

The possibility is very small. We mainly need to observe many situations, such as whether there is an epidemic in your hotel, dense personnel and other issues before we can judge. Normally, the chance is very small

The fresh air system is a ventilation system that exchanges outdoor air with indoor air after filtering. Therefore, the fresh air system plays the role of ventilation. When the filtration system is clean, this fresh air system is not conducive to the spread of disease. Exhaust air generally discharges air from the inside out, so the air flows from the inside out. In addition, COVID-19 can indeed be transmitted through the air, but this only occurs when the concentration of COVID-19 in the air is large and the air is not well circulated. For example, in air flow inspection environments such as dense crowds and closed spaces, the possibility is unlikely. Even if infection is suspected, laboratory testing is required. I can only say that judging from the current situation across the country, the possibility is relatively small.