CDC recommends: “If it is safe, please open doors and windows.” “Even just opening windows or doors will help increase outdoor airflow, which helps reduce the concentration of potential virus particles in the air. If the temperature is too low or too hot, please Adjust the thermostat.”
The CDC pointed out that it is important to ensure that the opened windows are not dangerous. It said: “Do not open doors and windows, otherwise it will pose a safety or health risk (such as falling, exposure to extreme temperatures or triggering asthma symptoms).”
The same is true for buses.
“Open the windows of transport vehicles.” The CDC says that the more windows that can be opened, the better the windows, but even if they break, it will help.
The CDC said on a newly released webpage that using masks can prevent the spread of the virus in the first place. But good ventilation is also very important.
It added: “Use a child-safe fan to increase the efficiency of open windows. Securely fix the fan on the window to blow out potentially contaminated air and draw in new air through other open doors and windows.” If conditions permit, consider doing outdoor activities, class or lunch.”
The new guidelines also cover heating, ventilation and air conditioning (HVAC) systems. It recommends: “Set up the HVAC system to absorb as much outdoor air as the system allows.” “If possible, increase the total airflow provided by the HVAC system to the living space. More airflow will promote air mixing and ensure Any recirculated air passes through the filter more frequently.”
Filtration is also important, but the filter should not reduce airflow.
The CDC says that certain air filters may also be useful.
It recommends: “Consider using portable air purifiers with high-efficiency particulate air (HEPA) filters to enhance air purification as much as possible, especially in high-risk areas, such as nurses’ offices or wards/isolation rooms.”
The Centers for Disease Control and Prevention says, too, a properly installed UV lamp (which should be high on the ceiling) may help.
“Consider using ultraviolet germicidal radiation (UVGI) in schools and non-family childcare programs as a supplementary treatment to inactivate the virus that causes COVID-19, especially when options for increased ventilation and filtration are limited. Please consult qualified Professionals help design and install any UVGI system.” said the Centers for Disease Control and Prevention.
If the ventilation is poor, virus particles can accumulate in the air in classrooms, cafeterias or corridors.
“If you look at all the high-profile outbreaks-the same underlying factors-no masks, poor ventilation. Whether it’s spinning lessons, ice hockey, camps, classrooms, choir practice ranges, or restaurants, it’s the same. The fundamental factor,” responsible Joseph Allen, who presided over the “Healthy Building Project” at the Harvard TH Chen School of Public Health, told CNN earlier this month.
Ventilation experts have been urging the CDC to talk more about the importance of clean air in schools.
Richard Corsi, Dean of the School of Engineering and Computer Science at Portland State University, said at a forum hosted by Bloomberg’s Johns Hopkins University Health and Safety Center: “The current state of ventilation in American schools is seriously inadequate.” School of Public Health this week.
But they said that schools should avoid dropping those fancy products, and promoters claimed that they would clean or disinfect the air.
Experts agree that the most important thing is fresh air.