COVID-19: improvement of ventilation in the room

Good ventilation helps protect against the spread of the COVID-19 virus. It replaces indoor air, fresh air outside, which can reduce the number of infectious particles in the room. Air filtration can also help, further removing virus particles, Dust, fungi and bacteria from the air.

How to improve the ventilation of the room?

The larger the gathering of people in the room, the more likely it is, that there is someone with COVID-19 there. When people infected with the virus breathe, they release infectious particles into the air. These particles accumulate most quickly in small rooms..

Естественная и механическая вентиляция помогает снизить уровень инфекционных частиц в помещении. Она делает это, replacing indoor air with outside air. In a well-ventilated room, the inhaled air does not seem stuffy and does not usually have an unpleasant odor.

Combined with individualized public health measures, good indoor ventilation helps prevent the spread of COVID-19.

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Natural ventilation of the room

If possible, open windows and doors regularly throughout the day, to improve natural air ventilation. Opening multiple windows can help a lot., creating a transverse flow of fresh air. If the windows have holes like the top, and from below, open both for maximum inflow of clean air from the outside.

In cold or humid areas, or if safety or air quality is a concern, open doors or windows immediately, for a few minutes at a time.

If there is a reason to worry about ventilation in the room or you can not open the windows or doors:

  • avoid visiting the premises if possible;
  • keep as much physical distance as possible from other people;
  • wear a mask, and better respirator with valve;
  • consider mechanical ventilation, in a pinch.

Mechanical ventilation of the room

Many buildings use a central heating system for mechanical ventilation indoors., ventilation and air conditioning (HVAC). If your room has vents on the ceiling, walls or floor, it, probably, it uses a heating system, ventilation and air conditioning.

Consult an HVAC Specialist, below:

  • make sure, that the system matches the type of configuration, Activity, number of people and length of time, during which the space will be occupied;
  • Consider improvements to increase outdoor air exchange rate and filtration efficiency. For example, use a particulate/carbon filter with maximum efficiency (в идеале – фильтр MERV 13 or higher), which the system can handle.

Perform routine maintenance of ventilation ducts and systems, for example:

  • keep vents and fans clean, carry out regular cleaning;
  • replace the carbon filter according to the manufacturer's recommendations.

If possible, включите вентилятор системы HVAC непрерывно. Это увеличит подачу чистого воздуха и уменьшит количество инфекционных частиц в помещении.

How to improve ventilation in certain conditions?

In addition to general recommendations, above, other measures may improve ventilation under certain conditions, such as houses, the apartment, long-term medical care facilities and kindergartens, Schools, Universities.

Ventilation in the house

Most homes use natural or mechanical (Heating, ventilation and air conditioning) ventilation, и следует соблюдать приведенные выше рекомендации. You may also want to consider the following measures:, especially in the presence of visitors.

  • If your home has a heat recovery fan (HRV) or fan with energy recovery (ERV), run it all the time.
  • If your kitchen or bathroom has exhaust fans, выходящие outwards, включите их на низкой скорости. Это поможет удалить загрязненный воздух без значительных перепадов давления.

Long-term care facilities

Most large buildings have a heating system, ventilation and air conditioning. Обслуживающий персонал и операторы этих зданий должны понимать, как работает система HVAC и как ее обслуживать. Помимо приведенных выше рекомендаций по естественной и механической вентиляции, they should:

  • avoid recirculation of potentially polluted air;
  • operate the equipment, such as heat recovery fans (HRV) or fans with energy recovery (ERV), continuously.

Ventilation in schools, gardens, Universities

In addition to the above recommendations, Staff may consider:

  • opening windows and doors between different classroom or shared space usage groups;
  • if possible, hold outdoor events.

Portable Air Purifiers

Очистители воздуха также известны как портативные устройства для фильтрации воздуха. При правильном использовании они могут уменьшить количество некоторых вирусов в воздухе. Выбирая очиститель воздуха, select your device, That:

  • equipped with a highly efficient air filter for particulate matter (HEPA);
  • suitable size for the room, in which it will be used;
  • certified by a recognized body in your country.

Использование очистителя воздуха в помещении может добавить дополнительный уровень защиты. Однако очиститель воздуха следует использовать вместе с другими индивидуальными мерами общественного здравоохранения.

Fans and monoblock air conditioners

Portable Fans, ceiling fans and individual air conditioners usually circulate indoors, но не обмениваются воздухом. Они могут увести вирус далеко от его источника, тем самым Increasing риск передачи инфекции.

If you are using these devices, make sure, that the airflow does not blow directly at or between people.

Мониторы двуокиси углерода (CO2)

People, animals and plants are the main source of CO2 внутри помещений, помимо фонового уровня в нашей атмосфере. На выдохе мы выпускаем CO2 в воздух. Когда уровни CO2 в помещении высоки или увеличиваются, it can mean, that ventilation is not enough to remove exhaled air from the room.

Существующие стандарты и рекомендации по уровням CO2 indoors based mainly on, how the air smells and feels in the room. They are not based on the influence of CO2 на здоровье или риске передачи болезней.

Low CO2 в помещении не обязательно означает низкие риски передачи. Сами по себе уровни CO2 не отражают всех рисков передачи. For example, they won't specify, is someone present in a room with COVID-19 virus. In addition, уровни CO2 will not reflect the use of other public health measures, such as wearing a mask/respirator, or ventilation improvements, which may be the result of air filtration measures taken.

Соответствующий мониторинг CO2 требует:

  • precise device;
  • correct installation in the right place;
  • regular accuracy checks (calibration);
  • frequent monitoring.

Чтобы мониторинг CO2 был полезным инструментом для контроля качества воздуха в помещении, you need act, когда его уровни высоки или растут. For example, You can:

  • reduce the number of people in the room, Room;
  • avoid classes, related to singing, screaming or exercising;
  • move to the street or to better ventilated rooms;
  • open windows or doors, be closer to them;
  • increase the amount of outdoor air, supplied through the HVAC system;
  • Use portable air purifiers.

These guidelines will help you keep yourself safe., and take appropriate precautions in time, when you encounter similar situations, described in this article. Be healthy and breathe fresh, clean air.

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