no... sorry but your dad is wrong.
I assume your apartment has AC. that means you have constant air flow in your house and the chances of your "stale air" (if thats what you want t call it) coming back into your tent is highly unlikely.
I try to keep the AC on auto when im growing. That way it clicks on every 20 min for a few minutes and circulates the air in my area.
If your not worried about the smell in your house, then ventilating back into your room is fine.