Natural ventilation against COVID aerosols

It is true that even months later, we still do not know some specific aspects of the coronavirus, but there are others that seem to be quite clear. One of them is that its contagion is more likely in closed spaces lacking optimal ventilation.

That is why it is very important to avoid, as much as possible, this type of environment. It is not always possible, and in those cases, ventilating is the best alternative. 

There are different options to do this, but in the following lines, we want to focus on one of them. Therefore, we show you how Bnatural ventilation against COVID aerosols should be.

Why is natural ventilation against COVID aerosols beneficial?

However, it is true that at certain times of the year, opening windows may be uncomfortable due to the cold or drafts, but it is essential to carry it out.

As we mentioned, whether the building has mechanical ventilation or not, a very healthy complementary practice is to ventilate naturally at least twice a day..

In relation to this matter, health authorities frequently emphasize the importance of ventilating closed spaces. 

Furthermore, some experts state that it is as relevant, if not more than the use of masks, social distancing, or handwashing. It should not be forgotten that aerosols remain suspended in the air and that ventilation reduces their residence time in this medium.

When is natural ventilation against COVID aerosols necessary?

Moreover, if, for example, a specific room is used for a certain period, non-cohabiting individuals in it must have the windows opened for at least 15 minutes. 

We insist that this is a measure that should be applied both in buildings with mechanical ventilation and those without. 

Why is it important to control CO2 levels?

In this regard, a parameter whose analysis is essential is air renewal per occupant. Authorities recommend it to be at least 12.5 l/second and occupant. 

Therefore, to avoid exceeding those values, there are only two alternatives: increase ventilation or reduce occupancy to a minimum. 

Preventive measures to avoid the transmission of COVID-19 should follow a combined protection strategy so that the joint use of more than one measure allows for better protection.

It should be noted that none of the protective measures is 100% effective on its own to prevent transmission. Currently, the scientific evidence regarding the effectiveness of each measure concerning the disease is still limited and must be related to the risks and feasibility associated with its implementation.  

How should homes be ventilated?

In summary, it is important to thoroughly ventilate the house once the people who do not live in it habitually have left. Of course, it is most advisable that the ventilation is cross-ventilation, that is, opening windows and doors in opposite directions. This way, you will create drafts, cleaning the air much more effectively.

The coronavirus is the worst pandemic experienced worldwide in the last hundred years. While we await the implementation of the much-anticipated vaccine, it is important to comply with all protocols set by health authorities. 

In this new scenario, the use of masks, maintaining social distance at all times, and washing hands frequently is vital. Furthermore, as we have noted in these lines, natural ventilation against COVID aerosols can be as important a measure as the ones already mentioned, so you should not stop putting it into practice.