COVID-19 Guidance for Mechanical Systems
As response to the coronavirus (COVID-19 or SARS-CoV-2) pandemic, REHVA experts drafted a guidance document on how to operate and use building services in areas with a coronavirus outbreak to prevent the spread of COVID-19 depending on HVAC or plumbing systems related factors. We prepared COVID-19 Guidance for Mechanical Systems.
Practical recommendations for building services operation
- Increase air supply and exhaust ventilation
- Use more window airing
- Humidification and air-conditioning have no practical effect
- Safe use of heat recovery sections
- No use of recirculation
- Duct cleaning has no practical effect
- Change of outdoor air filters is not necessary
- Room air cleaners can be useful in specific situations
Toilet lid use instructions
Summary of Practical Measures for Building Services Operation
- Secure ventilation of spaces with outdoor air
- Switch ventilation to nominal speed at least 2 hours before the building usage time and switch to lower speed 2 hours after the building usage time
- At nights and weekends, do not switch ventilation off, but keep systems running at lower speed
- Ensure regular airing with windows (even in mechanically ventilated buildings)
- Keep toilet ventilation 24/7 in operation
- Avoid open windows in toilets to assure the right direction of ventilation
- Instruct building occupants to flush toilets with closed lid
- Switch air handling units with recirculation to 100% outdoor air
- Inspect heat recovery equipment to be sure that leakages are under control
- Switch fan coils either off or operate so that fans are continuously on
- Do not change heating, cooling and possible humidification setpoints
- Do not plan duct cleaning for this period
- Replace central outdoor air and extract air filters as usually, according to maintenance schedule
- Regular filter replacement and maintenance works shall be performed with common protective measures including respiratory protection
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