Using the Wells-Riley equation, we built this simple analysis tool to help building operators understand the contribution of the HVAC system to the overall risk of spreading the virus which causes COVID-19 in buildings and the utility of different operation strategies in decreasing that risk, the top being:
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As an alternative to traditional air conditioning systems, consider direct evaporative cooling as a means of cooling incoming air and adding hydration to the space as well. It provides cooling, fire protection, and air cleaning at only the cost of water.
We’ve made assumptions about critical constants in the calculator that we believe are conservative but currently have a high degree of error.
Key among them is the quanta assumption for COVID which at time of publishing has a high degree of error associated with it.
We’ve assumed 48 as our quanta constant in this implementation. If you’d like a version of this calculator that allows you to adjust the assumption for quanta, let us know.