Coronavirus 2019-2020 thread (no unsubstantiated rumours!)

AndrewS

Brigadier
Registered Member
Just a thought.

Given that other viruses inactivate (die) faster at higher temperatures, what is the optimal temperature for air conditioning?

For offices in tropical Singapore for example, 22C-24C has been suggested as the optimal temperature range.
In Japan, they turn on air-conditioning only when the temperature reaches 28C.

But in many places air-conditioning is set for lower temperatures.
So it seems to me that a global reset of air conditioning temperatures would be beneficial as:

1. It means the higher ambient air temperatures kills viruses faster
2. It reduces air-conditioning electricity consumption. That reduces operating costs, helps save the environment, and reduces imports of coal and oil from a national security point of view.
 

Intrepid

Major
But in many places air-conditioning is set for lower temperatures.
So it seems to me that a global reset of air conditioning temperatures would be beneficial as:

1. It means the higher ambient air temperatures kills viruses faster
2. It reduces air-conditioning electricity consumption. That reduces operating costs, helps save the environment, and reduces imports of coal and oil from a national security point of view.
Dehumidifying the air is more important than the temperature. In addition, modern office buildings always have the air conditioning in operation, because for security reasons you cannot open windows.
 

siegecrossbow

General
Staff member
Super Moderator
Just a thought.

Given that other viruses inactivate (die) faster at higher temperatures, what is the optimal temperature for air conditioning?

For offices in tropical Singapore for example, 22C-24C has been suggested as the optimal temperature range.
In Japan, they turn on air-conditioning only when the temperature reaches 28C.

But in many places air-conditioning is set for lower temperatures.
So it seems to me that a global reset of air conditioning temperatures would be beneficial as:

1. It means the higher ambient air temperatures kills viruses faster
2. It reduces air-conditioning electricity consumption. That reduces operating costs, helps save the environment, and reduces imports of coal and oil from a national security point of view.

According to my uncle in Shanghai, they closed off the central heating system within their office building when they first got back to work during late February. Since most air conditioning in office buildings are central air conditioning they might facilitate the spread of virus when operational. If the virus persists in summer months, people are better off working from home since I don't think that it is humane to work in essentially a steel/glass/concrete cage without temperature control.
 

AndrewS

Brigadier
Registered Member
According to my uncle in Shanghai, they closed off the central heating system within their office building when they first got back to work during late February. Since most air conditioning in office buildings are central air conditioning they might facilitate the spread of virus when operational. If the virus persists in summer months, people are better off working from home since I don't think that it is humane to work in essentially a steel/glass/concrete cage without temperature control.

Don't air conditioning systems have HEPA filters or UV lamp sanitising systems to disinfect the airflow?

I'm agree that that you do need temperature control, but there are far too many places which set the temperature too low.
 

Anlsvrthng

Captain
Registered Member
Just a thought.

Given that other viruses inactivate (die) faster at higher temperatures, what is the optimal temperature for air conditioning?

For offices in tropical Singapore for example, 22C-24C has been suggested as the optimal temperature range.
In Japan, they turn on air-conditioning only when the temperature reaches 28C.

But in many places air-conditioning is set for lower temperatures.
So it seems to me that a global reset of air conditioning temperatures would be beneficial as:

1. It means the higher ambient air temperatures kills viruses faster
2. It reduces air-conditioning electricity consumption. That reduces operating costs, helps save the environment, and reduces imports of coal and oil from a national security point of view.

Dehumidifying the air is more important than the temperature. In addition, modern office buildings always have the air conditioning in operation, because for security reasons you cannot open windows.

I read few article, it looks like the humidity/temperature range define the survival time of the viruses.

But this is not simple, the effective humidity level depends on the type of the virus.

Higher temperature killing the virus faster, but the humidity level that is most hostile for viruses is between 60-80%, depending on the type .
Keep the temperature as high as possible ,and the humidity as high as possible - on 23+ Celsius it is not that easy to keep high humidity level.

Interesting is, low humidity level actually keep the virus alive longer.

So , dry / cold air favourable for the spread of viruses.
 

vincent

Grumpy Old Man
Staff member
Moderator - World Affairs
According to my uncle in Shanghai, they closed off the central heating system within their office building when they first got back to work during late February. Since most air conditioning in office buildings are central air conditioning they might facilitate the spread of virus when operational. If the virus persists in summer months, people are better off working from home since I don't think that it is humane to work in essentially a steel/glass/concrete cage without temperature control.

most office buildings in Shanghai have windows
 
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