Vmc control according to external and internal humidity - LUA

[paolo 3]

 

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ΔRH=2.64*ΔT-4,86

 

where ΔT= external temperature - internal temperature

program shoud be:

IF external temperature > internal temperature and (internal humidity + ΔT) <  External humidity THEN switch VMC on

 

 

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So i need to switch on Vmc only if i don't apply moistere from outside.

 

[Jurassik 2]

Hi did you find solution?

 

regards

[SmartHomeEddy 900]

I don't know what @paolo really meant to do. 

 

But there is a way to convert the relative humidity to absolute humidity. Absolute humidity (humidity, air pressure, temperature) can be compared more easy, for example the absolute humidity of a living room versus the absolute humidity of a bathroom. That way you could setup your fan easily. 

[paolo 3]

14 hours ago, Jurassik said:

Hi did you find solution?

 

regards

YES

I solved by installing an air conditioner to be used in the summer months instead of floor cooling.

[paolo 3]

4 hours ago, SmartHomeEddy said:

I don't know what @paolo really meant to do. 

 

But there is a way to convert the relative humidity to absolute humidity. Absolute humidity (humidity, air pressure, temperature) can be compared more easy, for example the absolute humidity of a living room versus the absolute humidity of a bathroom. That way you could setup your fan easily. 

My question was how it was possible to insert mathematical formulas into a lua scene, it was necessary to calculate the humidity that the VMC would introduce into the house in the summer months when I turned on the floor cooling. Not everyone knows (even I didn`t know) that floor cooling in addition to VMC in countries with very humid summer climates creates a problem of excess humidity inside the house. So I would have liked a scene that would stop the VMC if the outdoor humidity was greater than the formula calculation I had posted, which varies with both indoor and outdoor temperatures and humidity, and therefore has no fixed value.

1 minute ago, paolo said:

My question was how it was possible to insert mathematical formulas into a lua scene, it was necessary to calculate the humidity that the VMC would introduce into the house in the summer months when I turned on the floor cooling. Not everyone knows (even I didn`t know) that floor cooling in addition to VMC in countries with very humid summer climates creates a problem of excess humidity inside the house. So I would have liked a scene that would stop the VMC if the outdoor humidity was greater than the formula calculation I had posted, which varies with both indoor and outdoor temperatures and humidity, and therefore has no fixed value.

now after several years of experience I know that I could have used some variables and scenes to calculate the variables in a simple way, at first I thought I would have to put the whole formula in one lua code string (which is probably possible).

 

[Jurassik 2]

Hi can you help me to create a LUA for my VMC its on this link 

 

 

Regards