![coronavirus, COVID-19, HVAC, indoor, health, environment, air quality, ventilation, filtration, particles, quarantine, Corona zahlen, outbreak, contaminations, particles, humidity, airborne, transmission, virus, infection, air-conditioning, WHO, droplets coronavirus, COVID-19, HVAC, indoor, health, environment, air quality, ventilation, filtration, particles, quarantine, Corona zahlen, outbreak, contaminations, particles, humidity, airborne, transmission, virus, infection, air-conditioning, WHO, droplets](https://www.rehva.eu/fileadmin/_processed_/3/0/csm_covid_guidance_Directory_09fa613015.png)
coronavirus, COVID-19, HVAC, indoor, health, environment, air quality, ventilation, filtration, particles, quarantine, Corona zahlen, outbreak, contaminations, particles, humidity, airborne, transmission, virus, infection, air-conditioning, WHO, droplets
![coronavirus, COVID-19, HVAC, indoor, health, environment, air quality, ventilation, filtration, particles, quarantine, Corona zahlen, outbreak, contaminations, particles, humidity, airborne, transmission, virus, infection, air-conditioning, WHO, droplets coronavirus, COVID-19, HVAC, indoor, health, environment, air quality, ventilation, filtration, particles, quarantine, Corona zahlen, outbreak, contaminations, particles, humidity, airborne, transmission, virus, infection, air-conditioning, WHO, droplets](https://www.rehva.eu/fileadmin/user_upload/covid_guidance_website_download_button_v2.png)
coronavirus, COVID-19, HVAC, indoor, health, environment, air quality, ventilation, filtration, particles, quarantine, Corona zahlen, outbreak, contaminations, particles, humidity, airborne, transmission, virus, infection, air-conditioning, WHO, droplets
![REHVA on Twitter: "As schools are thinking how to safely reopen after # COVID19 #pandemic, #REHVA comes with a school buildings guidance. Find the full guidance document here: https://t.co/pk4UE8zKy1 #Covid_19 #ventilation #schoolsreopening https://t.co ... REHVA on Twitter: "As schools are thinking how to safely reopen after # COVID19 #pandemic, #REHVA comes with a school buildings guidance. Find the full guidance document here: https://t.co/pk4UE8zKy1 #Covid_19 #ventilation #schoolsreopening https://t.co ...](https://pbs.twimg.com/media/EdswRLHXoAI6NN3.png:large)