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+ Quick Guide:
This tool simulates the long range airborne spread SARS-CoV-2 virus in a finite volume and estimates the risk of COVID-19 infection. It is based on current scientific data and can be used to measures the effectiveness of different mitigation measures.
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- For detailed explanations on how to use this tool please see the COVID Calculator user-guide .
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- Usage summary:
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- Room data
- Enter the data about the area you wish to study. You can find these figures in GIS Portal, or by measuring them yourself.
- Ventilation data
- Enter the data on the available means for venting of indoor spaces. For mechanical ventilation, you should check with a specialist for the air flow or air change rate.
- For HEPA filtration, you should enter the air flow of the device. As a first estimate, you may use the following values based on the differnet fan velocities of a specific commercial device proposed by the HSE Unit - Level 6 (max) = 430 m^3/h (noisy); Level 5 = 250 m^3/h (ok w.r.t. noise); Level 4 = 130 m^3/h (silent); Level 3 = 95 m^3/h (silent).
- Event data
- Enter the total number of occupants in the room and how many of them you assume are infected. We have provided common activity types:
- Office/Meeting = typical scenario all persons seated, talking.
- Workshop = assembly workshop environment, all persons doing light exercise, talking.
- Training = one person (the trainer) standing, talking, all others seated, talking quietly (whispering). It is assumed the trainer is the infected person, for the worst case scenario.
-You should specify if the event is a one off (give date) or recurrent use of the same space for the same activity, in which case select the month when the activity takes place.
- Specify if a lunch break should be included, and when it starts/stops.
- If you will take coffee breaks, they are spread out evenly throughout the day, in addition to lunch.
- Mask wearing: Specify if they are worn at occupant workstations, or are removed when a physical distance of 2m is respected.
+ Ventilation data:
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Mechanical ventilation = check with a specialist for the air flow or air change rate.
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HEPA filtration = enter the air flow of the device. The following values are based on the different fan velocities of a specific commercial device proposed by the HSE Unit:
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Level 6 (max) = 430 m^3/h (noisy)
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Level 5 = 250 m^3/h (ok w.r.t. noise)
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Level 4 = 130 m^3/h (silent)
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Level 3 = 95 m^3/h (silent)
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+ Activity types:
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Office/Meeting = typical scenario all persons seated, talking.
Training = one person (the trainer) standing, talking, all others seated, talking quietly (whispering). It is assumed the trainer is the infected person, for the worst case scenario.
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+ Activity breaks:
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Specify if a lunch break should be included, and when it starts/finishes.
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If you will take coffee breaks, they are spread out evenly throughout the day, in addition to lunch.