Russia: #Sarmat "Satan II" #MERV Equipped #ICBM Put On Combat Duty. The Russian President has made claims that the Sarmat missile system can hit any target on Earth and also claimed that the missile system is "invincible".

Read More:
https://www.defconlevel.com/space-command-news.php#breaking-news

#TIL about the worst-case particle size for HEPA filters from a short EPA article — “remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). The diameter specification of 0.3 microns responds to the worst case; the most penetrating particle size (MPPS). Particles that are larger or smaller are trapped with even higher efficiency.” http://www.epa.gov/indoor-air-quality-iaq/what-hepa-filter [also a simple #MERV chart]

#TIL about the worst-case particle size for HEPA filters from a short EPA article — “remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). The diameter specification of 0.3 microns responds to the worst case; the most penetrating particle size (MPPS). Particles that are larger or smaller are trapped with even higher efficiency.” http://www.epa.gov/indoor-air-quality-iaq/what-hepa-filter [also a simple #MERV chart]

https://threadreaderapp.com/thread/1594354499434426368.html

#hepa
#merv
#cleanair
#airpurifers