Lol marijuana adapts to all kinds of weather. If the room isnt too hot for you it shouldnt be too hot for your plants. But like I said just get some fans, and if I were you I wouldnt get any loud fans or w/e. I dunno about your house but my house isnt very sound proof and with the type of fan you have my parents would hear that and get suspicious on why I have a fan running all day .

Btw I'm in the same situation as you. Where did you get those LR seeds? I'm growing now but I might have to terminate or do some extreme LSTing because I dont have a big space and those plant are probably gonna get bigger than 4 ft .