@Vlad *******
there is a difference between a government approved quarantine facility and home isolation. The CDC quote is for home isolation not a quarantine facility.
Fresh air does not disperse the virus, air flow does. But as you are alone in your hotel room you do not need an open window for air flow as you do not want to disperse the virus but contain it.
In the case of home isolation the CDC recommendation about open windows is aimed at preventing people in a household with a infected person transmitting the disease. Airflow is also an effective way to prevent transmission in a work environment.
Two different concepts for different circumstances.