COVID-19 Ventilation Calculator V2.1

This calculator was developed by Prof. Jarek Kurnitski and the REHVA COVID-19 Task Force for specialists with at least a minimum understanding of ventilation and air distribution. The tool is available for download for experts who have read and understood the related COVID-19 guidance document, as well as the explanation on the use of the tool or are enrolled in the REHVA COVID-19 course. To download the xls calculator and the user guide, please fill in the form below and accept the terms and conditions. Please, note that this is the second, updated version of the calculator.

Version 2.1 updates:

Virus variant multiplier estimated for the Omicron variant is added.

Version 2.0 updates:

Quanta emission rate representative values are changed from 85th percentile of preprint to 66th percentile
Introduction of virus variant multipliers to deal with Alpha and Delta variants
Complementary measures, such as portable air cleaners and facial masks
Probability of infection calculation is extended to the event reproduction number with new curves for model rooms

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Terms and conditions of use

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I acknowledge that the calculation model is based on the information currently available may include uncertainties and it is recommended for relative comparison of different measures.

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I acknowledge that this tool is only meant for specialists having at least a basic understanding about ventilation and air distribution. I have read and understood the related REHVA COVID-19 guidance and the user guide on how to use this tool. I will not share this document file with any third parties, only the link to this registration page. © owned by REHVA. Any publication without written permission is prohibited. Any use of this calculator for commercial exploitation is prohibited without a contractual agreement with REHVA.

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I acknowledge that REHVA has no liability for any direct, indirect, incidental damages or any other damages that would result from or relate to the use of the information presented in this calculator. I waive my rights to any claims and legal dispute whatsoever that is linked to the use and functioning of the tool.

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