leaving tent door open?

its pretty warm at present grow light is only half power sitting about 26-27°c.and im still im veg phase . if i keep tent door open and fan facing into the tent any issues doing this besides the extraction fan which i imagine i could turn off


and then just run the extraction fan lights off and close the tent up then losing one wall of mylar but plenty of airflow going in and around the tent

Your loosing the main benifit of using a tent, an isolated grow space. It is an effective method to help regulate heat, i do it myself. Your almost garenteeing that any contaminates in your lung room will get into your tent. A second exhuast kit to run filtered intake will have the same effect with less risk expescialy if you can pull it from outside your lung room at a lower ambient temp so your not just recycling tent air/heat