The CDC advises that “if it is safe to do this, open the windows and doors.” “Just opening windows or doors also helps increase outdoor airflow, which helps reduce the potential concentration of virus particles in the air. If it’s too cold or too hot, adjust the thermostat.”
The CDC noted that it is important to ensure that open windows are not dangerous. “If you do not open windows or doors, doing so may pose a risk to safety or health (such as falling, exposure to extreme temperatures, or increased asthma symptoms).”
The same goes for buses.
“Open windows in transport vehicles.” The CDC said the more windows that can be opened, the better, but cracking windows also helps.
The CDC said in a newly posted web page that the use of masks could prevent the virus from entering the air in the first place. But good ventilation is also important.
“Use child-safe fans to increase the effectiveness of open windows. Safely protect fans in windows to let out potentially contaminated air and other open windows and doors to draw in fresh air,” he adds. “Consider having activities, classes or having lunch outside when circumstances allow.”
The new guidelines also address heating, ventilation and air conditioning (HVAC) systems. “Set up HVAC systems to bring in as much outdoor air as your system will allow safely,” he suggests. “Increase the total airflow supply of the HVAC system to the captured locations when you can. More air flow promotes air mixing and ensures that any recreated air passes through the filter more often.”
Filtration is also important, but filters should not reduce airflow.
Some air filters may be useful, the CDC said.
“Portable Air Cleaners Consider using high-efficiency particulate air (HPA) filters to enhance air cleaning where possible, especially in high-risk areas such as a nurse’s office fee or in a sick / isolation room.”
Likewise, properly installed ultraviolet lights – it should be the highest, at ceiling level – can help, the CDC said.
“Consider using ultraviolet disinfection irradiation (UVGI) in schools and home-based child-care programs as a complementary treatment to neutralize the virus that causes COVID-19, especially if increased ventilation and filtration options are limited. Also help design and install the UVGI system, ”the CDC said.
With poor ventilation, viral particles can create a stir in the air in the classroom, cafeteria or hallway.
“If you pay attention to all the high-profile outbreaks – the same underlying factors – no masks, low ventilation. Whether it’s spin class, ice cream, camp, classrooms, courier practice or rest restaurant rent, it doesn’t matter. Underlying factors,” Harvard T.H. Joseph Allen, director of the Healthy Buildings program at Chan School Public Health, told CNN earlier this month.
Ventilation experts are urging the CDC to say more about the importance of clean air in schools.
“The state of ventilation in schools in the United States is currently very poor,” Richard Corsi, dean of College Ledge Engineering and Computer Science at Portland State University, told a forum at Bloomberg’s Johns Hopkins Center for Health Security. Public health school this week.
But they said schools should avoid dropping counterfeit products whose promoters claim they clean or disinfect the air.
What is most important, experts agree, is fresh air.
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