A
sneeze or a cough expels thousands of minuscule droplets filled with
bacteria and microorganisms into the air. These suspended particles
quickly spread through various means. How can you prevent the staff from
getting infected? A proper HVAC system goes a long way. A well-designed
installation process helps to prevent bacteria from spreading:
- Ventilation
- UV light
- Relative humidity
- Ventilation improves air quality
Ventilation
We
all know that the simplest way to get rid of viruses and bacteria is
proper and systematic ventilation. Imagine opening a window and letting
the old damp air out and fresh outside air in. A good HVAC system
ensures that there is always sufficient fresh air inside.
Although
fresh outside air keeps bacteria from spreading, there is also a
downside. Outside air needs to be treated by an AHU (Air-Handling Unit) –
and the more air, the bigger the unit. That in turn requires
recirculation to save on energy and installation costs. It is important
to strike the right balance between recirculation and fresh air.
Ultraviolet filtering
Placing
UV lights in the air-handling unit filters the air that enters the
unit. UV light has short wavelengths that are harmful to microorganisms,
breaking their molecular bonds and eventually killing or disabling
them. This cleanses recirculated air from bacteria and viruses.
Using relative humidity to prevent disease
Keeping
the relative humidity at a minimum of 40% has an enormous impact on the
spread of bacteria. Increased moisture makes the suspended particles
containing microorganisms heavier, causing them to stick to the floor
and walls and preventing them from spreading through space. It’s far
more difficult for bacteria to survive in a humid environment.
Dry
air in turn harms human resilience. It leaches moisture from the mouth
and nose, which normally traps microorganisms and prevents you from
getting sick. Without the moisture, you are more susceptible to colds
and the flu, for instance. Moreover, skin that gets dry and cracked is
more vulnerable to bacteria. And remember that keeping relative humidity
between 40% and 60% doesn’t just prevent sickness: it also keeps your
skin smooth and better looking.
Even so, the risk of viruses
spreading through the HVAC system is still very small. The chance of
getting infected by someone who sneezes or coughs is much more likely.
Moist droplets containing viruses that land on polished surfaces can
survive up to 48 hours. Inside a cold and humid duct system, they are
quickly killed or disabled.
Waves Aircon has modified itself to
the demanding scenario of today’s environment. These features of
up-gradation are available to all our existing customers in their setup.
For more details, please visit our website www.wavesaircon.in or post your query at care@wavesaircon.in
Source: https://www.wavesaircon.in/2020/10/role-of-hvac-in-combating-covid-19-at-workplace/