I'll Open The Window To Refresh The Air In The Room.

Hello everybody, when you want to open the window in the room to refresh the air in it. What do you usually say?

Which one of the following sentences sounds correct and natural or even common used. I made them up, of course.

1) I'll open the window to refresh the air in the room.

2) I'll open the window to renew the air in the room.

3) I'll open the window to change the air in the room.

4) I'll open the window to get some fresh air.

5) I'll open the window to have some fresh air.

Thank you