i dont know if that would be a good idea to have the fan on 24/7 because i heard its most efficienct when the head is at 210-220 degrees, and if the fan is alway son then it would cool it down more than that, which is why the fan comes on at certain times. and having a switch to turn it on and off would be a bitch too because you would have to know when and thats a PITA to have to keep doing that. thats just what i think?