like that too

please
if I got it right, it must be like that

hello and thank you Macro
But would it be possible to explain to me how to put an image on a post

please

oups
I tried to put an image but not succeeded or rather not knew how to do it

I hadn't thought about condensation

please
new on this forum, I will try to make a sketch and post it here

thanks for these informations
have a nice week end

hello In the room that I want to cool with an air conditioning, I have a ventilation duct that goes down to the lower floor and to which a small ventilation fan is connected and I wanted to pierce this duct that goes into the room to is it possible to connect the output of my air conditioner? ...