Also, if plenty of coal dust is dispersed within the air in a very given place, in really exceptional conditions, it could cause a dust explosion. These circumstances are usually within confined spaces. This is sensible, as it keeps the HEPA filter as protected as possible from larger dust particles. https://charliekodll.verybigblog.com/29174244/5-simple-techniques-for-volara-air-and-surface-pro-xl-vs-traditional-sanitizers-columbus