Rules of ventilation

You're right, there is always indoor air, but it's all about air quality. After all, it's the key component in the air - oxygen - that affects our health and well-being. In other words, the freshness of the air.

What does fresh air mean? Air freshness is a measure of how well the air is oxygenating your body. It is usually measured by the concentration of carbon dioxide. The permissible safe level of CO2 is regulated by GOST 30494-2011 «Residential and Public Buildings. Parameters of microclimate in premises».

Our apartments in which we live belong according to GOST to the premises of the 1st category: premises in which people in a lying or sitting position are at rest and rest; the level of carbon dioxide CO₂ in them should not be higher than 800ppm (millionths, partsper million), which corresponds to 0.08% of the concentration in the entire volume. 

What happens if there is more CO2 in the air? You'll feel weak, less productive, and sleepy. This may even seem normal, as we quickly become accustomed to repetitive conditions. To keep your indoor carbon dioxide levels in check, it's important to open a window regularly and let fresh air in. 

Having sorted out what concentration of carbon dioxide is acceptable for you and me, it is important to understand how much fresh air is important to run indoors to keep ourselves healthy and alert? 

These figures are described in SP60.13330.2016 «SNiP 41-01-2003 Heating, Ventilation and Air Conditioning». According to this norm it is important for us to receive 30 m3 of air every hour, provided that one person has more than 20 m² of the total area of the apartment. 

Also this important document states that all air in the apartment must be renewed at least once every 3 hours. The volume of air coming in from the street must be proportional to the number of people in the apartment. 

How often is it important to ventilate your apartment? 

There is an opinion that you should ventilate 2-3 times a day, or as often as you have to. If it's stuffy, air it out if you remember.

Really, this is a «worldly opinion». In fact, this amount of airing is not enough for normal air renewal in your apartment. Let's figure it out together. 

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To keep indoor CO₂ concentration no higher than 800 ppm as per the norm, it is important to renew the air, ventilate as soon as the norm is disturbed. But you and I don't have built-in carbon dioxide sensors. So what should we do? 

Scientific evidence suggests that the average person exhales about 0.02 m³ of CO₂ per hour. This figure will allow us to determine when, with the windows closed, the CO₂ standard will be breached while you and your loved ones are breathing in the apartment. 

To determine how often it's important to ventilate your room, multiply 0.02 by the number of people in the room, then divide that by the volume of the room and multiply by 100. You'll get the percentage of CO₂ in the room, and to convert that to ppm, multiply the number by 10,000. 

If the final figure is less than 800 ppm, for example you get a result of 400 ppm, then ventilating every two hours is sufficient.If calculations indicate a twofold excess of 1600 ppm, then it is required to ventilate once every half hour and so on. 

It seems very difficult.

But let's just look at the illustrative examples:

Imagine a room with an area of 17 m2 and a volume of 44.2 m3. With the windows closed, two people in it will emit 0.02*2 = 0.04 m3 of CO₂ into the air in an hour, then 0.04/44.2 = 0.0009, then 0.0009*100 =0.09% or 0.09*10,000 = 900ppm.Thus, the proportion of CO₂ in the room will be 0.09% or 900 ppm. 

That is, in an hour of the presence of two people, the CO₂ level will exceed the optimal level according to GOST. It turns out that in order to maintain the level of CO₂ within the normal range, this couple needs to ventilate the room at least once every hour for happiness. 

And for this, it is important to have the intention to take care of your health! We are sure that you definitely have it.

The rate of air renewal in a room is determined by the volume of incoming air, but it is difficult to control it when ventilating through a window, since this is influenced by the size of the window, temperature difference, wind and building design. You can only adjust the degree of window opening to increase the inflow. The full opening of the window provides a greater flow of air, as opposed to a partially open one. If the air supply is insufficient, it is worth opening a window on the other side of the apartment, especially when the temperature inside and outside is similar.

• Open the window completely, so you get a bigger influx. During the upper ventilation, when the window sash is open, too little air enters the apartment. 
• If there is almost no street air coming through the wide-open window, then try to open the window in the opposite part of the apartment. The reason is a weak draft: when the temperature outside does not differ much from the temperature in the apartment, the air in the room is practically not updated during ventilation. 
• And if all the windows in the apartment face one side, then it will not be possible to increase the inflow rate using through ventilation. 

And the key point that is critically important for: during ventilation, the air will come from the street, most often polluted by emissions and suspended particles of industrial and construction dust, exhaust, tobacco and stove smoke, and so on.

Do you want to open windows and ventilate without harm to your health? Leave a request for a window filter, get advice and a free visit from an engineer!

Depending on the time of year, it is important for you and me to approach ventilation in different ways. The main thing is to find a middle ground between fresh air and a cozy temperature in the house. In winter, try not to let the heat out of the house, and in summer, try not to let the heat inside.

To keep warm at home and at the same time enjoy the fresh air, here are some recommendations for you: 

• Open the window completely for ventilation, as a crack or a window pane will not help much and will quickly cool the room.
• It's better to leave the room after you open the windows, otherwise you may catch a cold. Do not forget to close it later so as not to overcool. 
• Ventilate the bedroom before going to bed, but do not leave it open all night so as not to catch a cold. 

When we ventilate a room in winter, the main headache is how not to cool the room. If you do not leave the room after opening the windows, you can easily catch a cold. 

And it's not always pleasant to wait a long time until the room gets warm again after ventilation. If you open the window every hour, then there will be plenty of cold periods. At night, you also want to breathe fresh air, but without the risk of a cold in winter it is difficult. As a result, we have to find a balance between fresh air and the need for warmth, although, unfortunately, there is no ideal solution. 

Do you want to automate the ventilation in the apartment? Leave a request, get advice and a free visit from an engineer!

In summer, the rules of ventilation change slightly:

• It is best to ventilate in the early morning or after sunset to avoid the heat. 
• To enhance the airflow, open the windows on opposite sides.
• Avoid drafts during sleep so as not to catch a cold.
• It is not recommended to ventilate during strong winds due to the risk of injury. 

In summer, more dust and pollen can get into the house, which is especially important for allergy sufferers during the flowering period of some plants. 

Regular wet cleaning will help to cope with dust, but it is more difficult to deal with pollen during the flowering period of allergenic plants like birch and alder, and allergy sufferers have to close the windows.

But with the Nanofiber NF2.0 filter, allergies are no longer a problem. This is its purpose – to protect you from suspended particles, in this case from pollen of plants, its size is more than 10 microns.

Another disadvantage of summer ventilation is the inability to renew the air during the day. You don't want to start a fever, but you need to get oxygen for breathing. In such a situation, many people turn on air conditioners, thinking that they get air from the street, but this is a misconception. The air conditioner does not supply air from the street, but deals with what is already inside. 

Therefore, the combination of Nanofiber NF2.0 and an air conditioner for cooling the air is an ideal option.

Do you want to breathe fresh air in the summer with this combination? Leave a request, get advice and a free visit from an engineer!

As a rule, manufacturers of other devices that also try to purify the air convince you of the disadvantages of opening windows. 

In fact, an open window is a psychological and physiological need of any person. So it was, so it is, and so it will be. You and I want to feel connected to the world, at least from time to time "getting out" of the four walls. 

An open window is an important part of every home. 

The simplicity of using, say, a NANOFIBER NF2.0 filter is that you just snap it into the window opening and that's it, it immediately turns the window itself into an air purification device. 

You do not need electricity, complex installation, crews, setup, damage to walls and so on. 

If you want to purify the air entering your home from pollutants and breathe fresh, clean, light air, so far there is only one solution in the world that combines simplicity, accessibility, ease of use and cleaning efficiency - NANOFIBER NF2.0.