Why Treating Recycled Air in Commercial Buildings is so Important
Did you know that ventilated air in commercial buildings is shared among all spaces?
In fact, the air extracted from all the rooms is mixed together, spreading contaminants from room to room.
Only a small percentage, about 10%, is rejected and replaced with outside air.
What happens to the other 90% of contaminated air? It is recycled and recirculated in all of the rooms...
Sometimes with insufficient filtration, sometimes without any filtration at all.
Your CO2 detectors will show good readings, because you evacuated 10% of the CO2, four to six times per hour.
This is enough to maintain a healthy level of CO2 for occupants, but what about for airborne viruses?
Ideally, we don't want to recirculate virus particles back into the rooms.
We want to filter and treat the recycled air with the best efficiency possible.
This applies to all commercial buildings including schools, elderly residences and offices.
What if the water coming out of your faucet was recycled from the rest of the building without being filtered and treated?
Would you drink that water?
And yet that's what we do with the air we're breathing.
Knowing this, which of these water filtration systems would you choose to purify the water coming out of your faucet?
As you can see, increasing the percentage of outside air to 20% or even 50% is not much better despite wasting a lot more energy.
89.93% is the "minimum" recommended by ASHRAE, the CDC and other organizations. Most new buildings use these filters called MERV-13. But is it enough? How can we get closer to 100%?
There are only two ways to properly treat recycled air before it enters the room: filters and UV-C light. These technologies instantly clean the air while passing through them.
Room air purifiers clean the air inside the room over a period of time but they do not prevent contaminated air from entering the room.
Air purifiers would be the equivalent of putting a small aquarium filtration system in your glass of dirty water and waiting until the water is clean before you drink it.
Unfortunately, you cannot wait until the air is clean before you breathe it.
That is why we created UV Diffusers. They treat the recycled air at the end of the ventilation system, right before it enters the room. They deactivate airborne viruses with UV-C light and they also catch dust, mold spores and other allergens with their filter.