@WJBL Landlords in Seattle, too, are threatening tenants with fines and eviction for installing AC units in windows of apartments. Of course, there’s no support here in “Realty World” for landlords to provide AC and MERV13 or HEPA filtering to tenants as part of basic leases. #TenantRights #ClimateCrisis #WildfireSmoke #PNW #PacificNorthwest #Wildfires #AC #ACunits #HEPA #MERV13 #SeattleCityCouncilFail

For anyone wanting air cleaners to deal with #Wildfire #Smoke this Summer, the best #MERV13 filters for assembling a #CRBox / #CorsiRosenthalBox are on a great sale at Costco through Monday June 26th: $45 for a 4-pack of any size.
https://www.costco.com/3m-2200-series-filtrete-1%22-filter%2c-4-pack.product.100337928.html

For anyone wanting air cleaners to deal with #Wildfire #Smoke this Summer, the best #MERV13 filters for assembling a #CRBox / #CorsiRosenthalBox are on a great sale at Costco through Monday June 26th: $45 for a 4-pack of any size.
https://www.costco.com/3m-2200-series-filtrete-1%22-filter%2c-4-pack.product.100337928.html

Some schools are really cleaning the air well. This school district has two HEPA air filters per classroom. Details & study, articles here:

#CleanAir #AirFiltration #MERV13 #CleanAirSchools #OregonSchools #CovidIsntOver

Check out this thread at Thread Reader App. https://threadreaderapp.com/thread/1663015904547065856.html

Derk et al, 2023: CR boxes out-performed single-filter DIY air filtration units. 5cm-thick #MERV13 filters out-performed 2.5cm ones. Best #CRbox config. reduced #aerosol exposure to 22% that of HVAC units alone. Adding universal masking reduced it to 6%. https://www.reddit.com/r/COVIDZero/comments/106647p/derk_et_al_2023_cr_boxes_outperformed/

Hoping to get some input from #HVAC #Engineers and other experts: in a school built in the 70s that originally had no walls and is now divided up into classrooms via a mixture of full height, 3/4 height, and half height walls and dividers...would getting walls & doors be helpful or harmful from a #CleanAir standpoint? HVAC has #MERV13 filters, & the building has a handful of #HEPA air purifiers, but very few windows.
#Covid #IndoorAir #Schools

We do have #MERV13 filters in the HVAC system, and when there are only a few people in the building (eg during a PTO building) the #CO2 levels are actually really good - in the 500-700 range! But when I sent the #Aranet in with my kids, CO2 in their classrooms built up throughout the day, maxing out around 1600ppm in one kid's class and over 2000 in the other.

Oh, I'm supposed to pin an intro post.

I'm here for the #Covid safety.

My partner was infected with #Covid19 by doctor's offices which weren't practicing proper airborne infection control. Twice.

#CovidIsAirborne by #aerosol .

#CovidIsNotOver .

Stop #Nosocomial #Infection .

#WearAMask #P100 #elastomeric #P3 #N99 #FFP3 #N95 #KN95 #FFP2 #KF94

#CleanTheAir #HEPA #MERV13 #CorsiRosenthalBox

People who are responsible for your home's #HVAC: are you using #MERV13 filters (much more expensive than #MERV11 but capable of filtering #COVID out of the air)? (Please boost for reach!)

@Benfell @ZeroCovidColin

We can stop #Covid easily.

We can't stop #cholera with vaccines. We stop cholera with water treatment plants, because cholera is in the water.

Also water filters and UV for long-distance hikers etc.

We stop #Covid with air cleaning -- #HEPA filters, #MERV13, #CorsiRosenthalBox -- because Covid is in the air.

And with #respirator #masks
( #N95 / #P100 / #P3 / #FFP3 / #FFP2 / #KN95 / #KF94 etc).

Side benefit: we also stop #flu and #RSV.

It's a #ParadigmShift.

"We follow #CDC Standards" is the new "Our doctors are licensed priests who pray before their surgery (but don't wash their hands)"

Clean water stops cholera.
Clean air stops Covid.

Medical staff need reusable #P100 masks. Medical exam rooms need portable #HEPA filters to bring the #CADR up to ACH 12.

#CovidIsNotOver #COVIDisAirborne #P100 #N95 #HEPA #CRBox #MERV13 #ACH12

RT @amir42@twitter.com

This is version 2 of my #CorsiRosenthalBox - this time built from a packing box for improved stability and longevity. I only used 3 #MERV13 filters this time (because of placement constraints). This seems not to hinder airflow much & gives a hint, which side to place to the wall.

🐦🔗: https://twitter.com/amir42/status/1492444162561564672

This is version 2 of my #DIY #CorsiRosenthalBox, this time built from a packing box for improved stability and longevity!

I only used 3 #MERV13 filters this time (because of placement constraints). This seems not to hinder #airflow & gives a hint, which side to place to the wall.

It has proven it's value. We are using it, when kids come over to play with our kids to support the #Masks they are using, when playing inside.

The #FilteredAir volume is a lot bigger than what #HEPA filters deliver!