there is a small amount of open space but you will go through some insulation. with the wire i used i could feel what i was hitting so that did help. i did not drag any insulation out any where so i either stayed on top or got lucky and snaked through it i guess lol in the one pic above you can see the insulated wire i used. 12 g braided wire indoor outdoor use, i bought at menards for stereo speaker amps, rated for higher amps than the fan pulls on high so i don't have an issue with heat in the wire itself. the power fan also works well with 6 speeds but i bought this one because it comes with a wall switch instead of remote. i lose remotes and batt's go dead. i can set this one so 1 touch of the on/off button and the lid opens and the fan turns on to what ever speed i set it at. makes it easier for when your cooking. i say this because since they installed a convection oven/microwave in our th'er they did install a vent/exhaust hood. this is why i added the power vent fan above the cook top. i also ordered the ceiling fan with wall switch because i just don't want more remotes to lose lol it is a 2 speed fan with a white switch which you can see in the pics above also mounted on the wall panel next to the ac/heater thermostat. i got lucky and had 2 12 volt fuse sockets left in the breaker panel under the fridge, to wire these unit individually.
'99 f350, quad cab long box, dually, 6 speed manual, gently mod'd.
2011 wolf pack 295 with full susp now!