4 steps to reduce the risk of infection and eliminate COVID 19

Today everybody talks about COVID-19.So is it safe working at indoor area? According to the recent WHO announcements, the biggest threats come from contaminated aerosols. I want to show you how to Eliminate COVID 19 , in the indoor area.

Let’s catch a look at this portion.when a person coughs, they throw liquid particles(aerosols) with a size of 0.01 microns up to 500 microns.to understand the micron size let’s talk about some examples.

Human hair varies in diameter is about 70 micron .

The smallest thing you can see with Your naked eye is about 40 micron.

corona-virus size is about 0.1 micron. That is 10 times bigger than the regular virus size. This is good news, Here is a secret of the filtration “bigger at the size, is easier to catch”.

Now we have a better understanding of micron size, let’s back to the topic. How we could remove the virus from the indoor atmosphere.?

Basically, this 0.1-micron virus, could mix with aerosols and spread into the atmosphere.

Here are four ways that assist you to decrease the risk of the presence of the virus at indoor facilities. You can Eliminate COVID 19 with high-quality filtration systems.


MERV : Minimum Efficiency Reporting Value, commonly known as MERV.basically you can consider it as the filter efficiency to remove dust for ventilation air.

Below chart that made by DAFCO shows , to have a better efficiency you will need a better MERV.

MERV 13 and above, have a good efficiency to remove 1-micron particles and aerosols.


Now that you understand what is the MERV, this is time to upgrade your filters.

As a rule of thumb use only Pleated air filters that provide a larger surface area of media compared to the filter size, which provides a low pressure drop and a greater area to catch dust driving low energy use over the service life.


When you have a lot of people come to the indoor public zone, such as nursery, banks , super markets and etc, you will need something more efficient and strong to clean the air. that is why a portable air purification system with HEPA filter could be a very good option.

HEPA is an acronym for “High Efficiency Particulate Air” or “High Efficiency Particulate Arrestance”

For example on PURASHIELD 500 portable filter that made by Purafil co , equipped with 4 layers of the filter media, to capture and eliminates target viruses, bacteria, and mold, for providing added protection.


If you have any questions about your air filter modification system for selecting MERV or portable air purification system, contact us.


S.O.S. Filtration Inc is a Canadian company with worldwide recognition. It is a training base company with technical craftsmanship and innovative strength.

The competence of S.O.S Filtration teams is based on more than Fifty years of experience in filtration.

Contact us to get more information on process filters @




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