#Merv

Dr. Alex Huffman

Six more box fan + MERV-13 filters (these for our kid's school). Layered mitigation efforts matter for COVID: social distancing, masks, increase ventilation, reduce indoor time with others, improve particle

1/ There have been lots of questions about filtration and SARS-CoV-2. To understand how effective a filter is going to be, you need to know two things: the size distribution

Energy Vanguard

Interesting, short thread from #IAQ researcher @Poppendieck. His point is that putting "new" air into a room doesn't mean you've removed an equal amount of "old" air. 1/15https://twitter.com/Poppendieck/status/13

Let's talk air flow in BART cars: BART cars filter & replace inside air about every 70 seconds. This was the case before COVID-19 and is still now. Air is

Dennis Miller delivering a joke reminds me of Garo Yepremian throwing a pass. Miller's material is as fresh as the BLT Soupy Sales left in the Merv Griffin Show dressing

We started studying cloth masks in March. Preprint now at https://www.medrxiv.org/content/10.1101/2020.11.18.20233353v1 Take-home: Cloth masks are not an N95, but they work reasonably well for aerosols 1-2 microns and larger, which

Dr. Shelly Miller

(1/n) No I am not going into restaurants to eat. I did have a delightful meal at SALT @bouldercolorado while seated outside. Here is anwe should be doing to assure

This is a bad idea to try on Twitter but here goes. But first some caveats:1) I'm going to work off of US standards because I don't have a copy

Is it worthwhile getting an indoor PM2.5/PM10 air particle counter? If we have air filters running and the air smells clear is a $150+ air quality meter overkill? For DIY

For every fellow west coast resident; How to Deal with All This Smoke, a thread : 1) If you have HVAC: • Program your circ mode to run more

Kliph Nesteroff

1970 - According to FBI correspondence, the Carol Burnett Show was "contributing to the breakdown in this nation's respect for law and order..." 1973 - The Carol Burnett Show was

LongDesertTrain

Pictured throughout thread are CO2 readings from my classroom Aranet4 CO2 meter. I have two 90-min classes (8:00-9:30, 9:40-11:10) & one 25-min homework/reading period (11:20-11:45) before lunch/prep from 11:50-1:15 &

Thread with excerpts from “The Great Game: On Secret Service in High Asia” by Peter Hopkirk Central Asia Napoleon’s plan to invade India by land with Russian help frightened the

Asit K Mishra 😷🪟

What do we mean by #UseAirbornePrecautions? There are clear guidelines in health care settings, but what do we mean by it for the public? A of (met-thread) on this.

Eric Feigl-Ding

AEROSOL TRANSMISSION—we need to keep hammering this. Key takeaways by @jljcolorado to avoid places:if it's crowdedif cannot keep distanceif it's a long timeif low ventilationif not wearing masksif people singing,

Sarah Mulhern Gross

School starts on Wednesday for me (remote for students). I have no idea what I am going to do because we've been told we don't need to wear masks if