Good ventilation is needed to prevent coronavirus infection indoors. In many lands the cold season is approaching, when people prefer to keep doors and windows closed to keep their homes warm. But it is very important to have a good ventilation system.

In the last few months, scientists have been urging people to wash their hands and maintain social distance to prevent COVID-19.

Now scientists, as well as engineers, say it's time to think about the air we breathe. People are starting to travel again in most places, especially after the lockdown has eased. Office courts, school colleges, shops, and restaurants are slowly starting to open.

Here are five key pointers in moving your ventilation

1. If the air in the house feels stuffy, get out

If you enter a room and think that the air there is fuggy, stale, then assume that the air in that room does not circulate.

If there is no outside open air in a room, your risk of getting COVID-19 infection will increase.

Recent studies have shown that there is a risk of "airborne infections" from the virus in closed rooms. Even if the tiniest particles of the virus remain in the air.

Even before the epidemic, government guidelines on workplace ventilation in Britain said it was mandatory to have a workplace system that provided 10 liters of clean air per worker per second. It is now very important to comply with the epidemic situation.

So, if a house seems closed, there seems to be a lack of open-air, get out of that house, says the expert engineer. Highwell Davis.

He says it is important to maintain a clean air supply:

"Suppose someone is infected in the building where you are, and if you inhale a lot of clean air from outside, the elements that have spread the virus into the air will become very weak by mixing with the air. Breathing in that air will reduce the risk of infecting others. "

2. Check the air conditioning system

Air conditioning is now available everywhere from offices to shops. People welcome it on hot days. But take a look at what kind of air conditioner is being used.

The most common use is split air conditioners mounted on walls or ceilings. Such an air conditioner draws air from the room, cools it, and releases it into the room again.

There is no reason to worry if the air conditioning device is used for a short time in the room. However, since there is a risk of long-term cuts, it is best to look at what type of equipment is being used.

A study conducted on a restaurant in China has blamed such air-conditioning devices for spreading the virus. Their study found that the man who came to the restaurant had the virus in his body, he was infected, but he did not know because even then his symptoms did not appear.

Scientists believe he released the virus into the air with his breath as he spoke, and a wall-mounted air-conditioning device pulled the virus and spread the infected air throughout the restaurant room.

As a result, nine more people who went to eat at the restaurant were infected. Based on this study, Dr. Davis says that it is very important that clean outside air circulates in the room."If there was a lot of outside air in the house, very few people would be infected there - may be no one would be infected."

3. How much of the outside air should be in proportion

In many modern buildings, the windows are permanently closed, there is no system to open the windows. So how will the outside air enter in those cases?

In that case, you have to rely on the ventilation system through which the polluted or trapped air of the house will be brought out and that air will go to the outside through a pipe and accumulate in the air circulation unit. Usually, this unit is on the roof of such a building.

Keeping the outside air at 100 percent increases the cost there. Because the amount of air that the machine will pull in from outside, the amount of air that needs to be heated in winter, and the amount that needs to be cooled in summer. So the higher the amount of air, the more fuel will be needed.

4. Testing the filter for viruses is also effective

Modern ventilation systems usually have filters, but there are always doubts about whether those filters work properly.

Researchers at the University of Oregon Health and Science in the United States have found that filters in ventilation systems trap some corona germs, but some viruses melt through those filters.

Kevin van den Wiemelenberg, the project's head professor, thinks that collecting swabs or samples from such filters can tell if anyone working or living in the building has been infected.

A man has infected more than 90 people at a call center on the 11th floor of an office building in South Korea.

Regular testing of the filter can quickly detect the presence of the virus.

Professor Kevin van den Weimelenberg says it is possible to decide where and when to prevent infection by examining filters.

5. Keep an eye on the airflow

If you ask any expert about this, he will say that clean outside air circulation is an important tool to prevent infection. But experts on aeration say it's not easy.

Nick Worth designed Formula One motor racing cars. Now he works to properly manage the air circulation process to keep the workers of supermarkets and food processing companies safe in the workplace.

He says if a worker works sitting next to an open window and if he is infected, the virus in his body will go down through the air through the window.

"If you open the window, where will the wind go?" The air will flow through the open windows in front and those who are in the airline outside will be the target of the virus, ”he said.

If the room is upstairs, the air will flow straight down a little.

"It's good to have plenty of outside air, but if it flows straight and is full of viruses, the consequences will not be as great for outsiders."

When asked about the situation, Professor Cath Knox said that mixing a lot of clean outside air with the virus would reduce the amount of the virus and reduce the risk.

He said the amount of virus that would enter through their breath, even if someone was in the air full of the virus outside the open window, was much lower and less risky.

There is disagreement among experts. This is not surprising. And many things about this virus are still unknown to people.

However, whether the air we breathe is virus-free or full of viruses is important for assessing the risk of infection.