At the moment with the health crisis of COVID-19, this recommendation is even more important than ever.

It is essential for health, especially for people with breathing problems, to stay in a room with good ventilation and preferably outdoors. So now that we are at home and have more time, we cannot forget to also think about our indoor air quality. Normally we are concerned about outdoor air pollution, but we rarely stop to think about the quality of the air we have inside our home, which is the one we breathe the longest. Especially now, where the whole family "stays at home", it is necessary to increase the usual ventilation, since the more people and hours in the home the greater the need for air renewal.

Why is ventilation so important?

In our home, heating appliances, kitchens, ovens, boilers, and the same people, can dispense pollutants such as carbon monoxide, nitrogen oxide or sulfur, they can gradually influence our health. To more people at home, we have a greater use of these devices and therefore we need more ventilation. It is important to ventilate all the rooms in the house daily and not only in good weather but also in winter. The lack of fresh air favors the transmission of the virus.

We must take into account when ventilating avoid drafts, and expose ourselves to low temperatures. Therefore, on windy or colder days, it is recommended to do ventilation individually, room by room.

Should we be afraid to open the window because the coronavirus could enter?

According to WHO experts, COVID-19 is transmitted mainly by contact with respiratory droplets, which is what we release when talking, coughing, breathing, or sneezing. Transmission by air is very difficult. Its permanence in the air can be about three hours, but according to experts, this does not mean that it spreads through the air, such as measles.

The World Health Organization (WHO) reports that the virus's stay for three hours in the air - in the state of tiny particles such as aerosols - does not imply that it spreads like measles, which can live up to two hours in the air where an infected person has coughed or sneezed.