Thank you for your answer !
There is another hole in the bathroom with water pipes inside, where i can open/close water. But what is interesting is that air is flowing into this hole meaning out of bathroom as long as my windows are opened. I was thinking of using some of the fans i already have at home, i have some heavy duty DC San Ace 12V 0.52A fans:
ebay.com/itm/Sanyo-Denki-109R1212H1011-Brushless-DC-San-Ace-Fan-12V-0-52A-120x120x38mm-/111606671624
They have only half the CFM of delta fan but i can use 2 of them and it doesn't cost me anything, and i can use a laptop power suply to power them, maybe use potenciometer/resistors to make it 12V.
ps: just a funny observation with my DC San Ace fan ... i tried running them on 12V AC for a long time and it worked just fine, no overheating or anything. I do know that when connecting some other smaller 12V fan to the same 12V AC it was overheating and u could smell it burning.
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