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5/26/21

Cheap Air Cleaner Made From Cardboard Will Reduce Virus Particles By 47%, Learn Research In America And How To Make It


Indoor corona protection: Cheap Air Cleaner Made From Cardboard Will Reduce Virus Particles By 47%, Learn Research In America And How To Make It






The whole family is now being infected in the second wave of Corona. The health ministry has even advised people to wear masks at home. The WHO believes that coronavirus can also be spread through the air in confined spaces. It is therefore clear that corona proliferation is a major problem in areas with low ventilation.

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Research published in the American Institute of Physics' journal Physics of Fluids has come up with news of a relief. In it, scientists proved that an air cleaner made from cardboard at a low cost can isolate corona viruses in the air as a 47% aerosol in an enclosed space such as a classroom.

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Students are at lower risk of corona if infected with it in the classroom. We can also use this cleaner at home.

Learn how to make it
This air cleaner can be easily made by fitting an air cleaner and box fan on a cardboard frame. In this cardboard frame the box fan is attached to the bottom of the filter in such a way that the fan air passes through the filter and pure air escapes from below.

Box fan size
0.5m X 0.5m

Air filter
0.5m X 0.5m X 0.1m with MERV i.e. Minimum Efficiency Reporting Value 13.
The higher the MERV of the filter, the better.

The importance of the MERV 13 filter is
a filter that prevents 84% ​​of particles of 0.3μm (micrometer) to 1.0 1.m in size and 90% of particles of 1.0μm to 3.0μm in size.



Aerosols are smaller than 5μm

Scientists say that when a person sneezes or coughs or speaks or sings a song, they expel drops of different sizes from the nose or mouth.
It is considered an aerosol if its size is 5μm or less. It spreads over long distances in the air.
1μm is equal to 1 millionths of a meter.
Therefore viruses that exist as aerosols cannot cross the MERV 13 filter.

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24 models were prepared assuming the teacher to be infected

These experiments were performed in 2 different laboratories. In it, scientists used tobacco smoke instead of coronavirus aerosols.
Assuming the teacher to be infected, he was simulated to give a lecture by standing in 2 places. In the first case a blackboard was erected in one corner of the classroom and in the second case a rakhi lecture was given in the middle of the classroom.
Apart from this the filter was placed next to the teacher, next to the ventilator in the classroom and behind the classroom.
The experiment created 24 different positions according to the teacher's standing space, air cleaner space, air direction and the size and temperature of the room.
The nature of the aerosol was studied for 50 minutes each time the lecture was assumed to be 50 minutes.

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Classroom model with ventilator
Most public schools in the United States have a horizontal unit ventilator in the classroom. They have our Calculation 2 on Air Change. This means that the air in the room changes 2 times every hour. So a similar ventilator was used in the experiment.

The size of the classroom in the experiment was
10 meters long, 5 meters wide and 3 meters high i.e. 32.8 feet X 16.4 feet X 9.8 feet room.

Researchers examined the effect of filters in 24 different situations, we know the result of 6 of them ...
1. When the infected teacher was in front of the blackboard in the classroom and there was not a cleaner

5% aerosol exits through the ventilator.
15% of aerosols remained in the air inside the classroom.
80% aerosol stuck to the wall and floor.

2. When the infected teacher was in the classroom and there was no air cleaner

8% exited the aerosol ventilator (HUV).
13% of aerosols remained in the air inside the classroom.
79% aerosols stuck to the wall and floor.

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3. When the infected teacher was in front of the blackboard and kept the air cleaner near them

43% aerosol air cleaner separates from air.
3% exited the aerosol ventilator (HUV).
3% aerosols remained in the air inside the classroom.
51% of aerosols stuck to the classroom wall and floor.

4. When the infected teacher was in front of the blackboard and placed near the air cleaner ventilator

41% aerosol air cleaner separates from air.
4% exited the aerosol ventilator (HUV).
7% aerosols remained in the air inside the classroom.
48% of aerosols stuck to the classroom wall and floor.

5. When the infected teacher was in front of the blackboard and put the air cleaner away from the ventilator

19% aerosol air cleaner separates from air.
6% exited the aerosol ventilator (HUV).
9% aerosols remained in the air inside the classroom.
66% of aerosols stuck to the classroom wall and floor.





6. When the infected teacher was in front of the blackboard and the air cleaner was left behind in the classroom

14% aerosol air cleaner separates from air.
5% exited the aerosol ventilator (HUV).
12% aerosols remained in the air inside the classroom.
69% of aerosols stuck to the classroom wall and floor.

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