I have a split air con Samsung SH09APG. It's a typical air con machine, with an inside and outside unit.
I was thinking it would be really useful if it allowed the outside air to come inside the house. Sometimes, you cannot open the window (noise outside, rain, ...), but it's still good to renew the air inside, to avoid lacking oxygen/stale air.
However, I couldn't see any way to make the outside air come inside. This confuses me, as I know these machines work by having large tubes hidden in the walls, to allow airflow between outside and inside.
There is a simple fan function, but I think it does not use outside air. Just pushes the air inside.
Even when I use it on cold mode (air con), I think it's not really using the outside air, but simply cools the air inside.
What am I missing, why is there no function to use outside air?