Airconditioner oxygen doubt?

Actually In a window type airconditioner, we have the option to cool the outside nouns and blow it into the room,
out any possibility of outside air entering the room except when the doors are opened.
So at hand is no way for oxygen to get into the room while sleeping inside.
Is it healthy or what is in actuality the best and healthy way to use the airconditioner,
which type of aircondittioner is healthy??
Answers:    Relax. There can't be copious bedrooms where the doors are so effectively sealed all round the edges that no oxygen can attain in. I prefer open windows myself, so I would arrange the heavens conditioning to bring in air from the outside, but lots of people sleep very well with the windows closed, and would be equally happy beside recirculated air.


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