oldCómo construir unos filtros de aire de bajo costo? Recursos aquí!
Translations by Emily Barnes Franklin – thank you! Click here to go back to all FAQ’s. Click here to go back to all FAQ’s.
done
oldRead Me First
Before reading any farther, even with 2 or 3 portable air cleaners in your space, everyone must wear a mask (more on masks, kids’ masks and reusable elastomeric respirators). Like getting closer to a cigarette smoker, respiratory aerosols get thicker… Read More »oldRead Me First
oldThe Record Player Build
This build by Amanda H, has a printed out record label in the middle. This build is simply amazing! Click through to see it in action!!! She was kind enough to provide the files so that you could recreate this… Read More »oldThe Record Player Build
oldType of Filters
20″x20″x1″ or 20″x20″x2″ MERV 13 filters are recommended. MERV 13-A filters are available here. Why 13-A? Because they are top of the line. If MERV 13-A filters are not available, the next filters recommended are MERV 13 filters from 3M . … Read More »oldType of Filters
oldType of Tape
Any type of duct tape is recommended. Keep in mind that you can use the duct tape color to accessorize your DIY Air Cleaner. Please see the Gallery for lots of creative fun ideas.
oldHow to build the shroud
Next, we are going to make a fan shroud..a fancy way of saying we are going to block off the square corners, so just the round fan is exposed. This was discussed here by Jim Rosenthal. Short version – the… Read More »oldHow to build the shroud
oldWe can only open our windows, but not if the children have to wear a coat? Natural Ventilation…
Quick Tip if your windows and doors open – at the VERY LEAST, open during breaks and lunches. Source: “If its cold, crack the windows rather than opening them fully and then open them wider to air the room periodically… Read More »oldWe can only open our windows, but not if the children have to wear a coat? Natural Ventilation…
oldType of Fan
The Corsi/Rosenthal Box is based on a 20″ x 20″ box fan. This is because the size perfectly matches with 20″x20″ filters. Some countries have no box fans. Round fans have been used to build the Corsi/Rosenthal Box. 20″ Box… Read More »oldType of Fan
oldI can’t bring in an air cleaner, but can bring in a fan – got any ideas?
“Lasko FF305 Air Flex 2-in-1 20-inch Box Fan and Air Purifier in One with MERV10 Air Purifying Filter” Won’t be as good – but something is better than nothing! The filters here are 13-A – so I would buy one… Read More »oldI can’t bring in an air cleaner, but can bring in a fan – got any ideas?
oldWhy should it be pointed up at the ceiling? I saw a study that said pointed down is better.
That study did not include the risk of reaersolization (blow back up in the air) of dried respiratory aerosols that will have settled on the ground. You will give a little in efficiency to gain safety. http://poppendieck.com/IAQ/COVID19%20FAQ.html
oldI just want to buy an air cleaner.
Please see our air cleaner/filter buying guide. Also these tweets are two excellent sources – both from Indoor Air Quality Experts. This is Dr. Shelly Miller – who authored this tweet – and co-authored the tools she mentions here. This… Read More »oldI just want to buy an air cleaner.
oldRound Fan Build – for countries with no box fans.
Some countries don’t have box fans, but have round fans. “Presenting V1.0 accessible, effective and validated DIY filters using round fans inspired by the #CorsiRosenthalBox. They are the result of international collaboration from designers, engineers and advocates in @TheWHN Airborne… Read More »oldRound Fan Build – for countries with no box fans.
old1 Filter Build – aka single filter strapped to the back of a box fan.
Here’s what the final build can look like with judicious use of duct tape. Pretty, pretty sharp: Here’s the actual build from the above Twitter thread. Here’s a more simple, slightly less effective single filter build by aerosol scientist, Dr.… Read More »old1 Filter Build – aka single filter strapped to the back of a box fan.
old2 Filter Build – Forms a Triangle – top and bottom are cardboard.
Here’s one as a goal – it’s the same triangle filter as in the video, but with a shroud added for optimum performance, and adhesive contact liner layered over the cardboard. Beautifully done! This was what it looked like before… Read More »old2 Filter Build – Forms a Triangle – top and bottom are cardboard.
old4 Filter Build – A Corsi/Rosenthal Box also called the Compretto Cube. Top is a fan, but the bottom is just cardboard – no bottom filter.
There are several different builds below. No matter which one you choose make sure you put a shroud on the front of the fan to enhance efficiency. Here is a 4 filter build known as the Compretto Cube: hosted by… Read More »old4 Filter Build – A Corsi/Rosenthal Box also called the Compretto Cube. Top is a fan, but the bottom is just cardboard – no bottom filter.
old5 Filter Build – The Original Corsi/Rosethal Box where the top is a fan, and bottom is a filter.
End goal: Shopping List – the below links may quickly no longer be valid, so including a description of each item. No affiliation with any company whose products I have listed: 20″ Box Fan. Tape. Filters. Build time! Tape the… Read More »old5 Filter Build – The Original Corsi/Rosethal Box where the top is a fan, and bottom is a filter.