If you have the refer in a slide room and you have an upper and lower access doors and no roof vent. Install the fan behind the upper door blowing OUT. You do NOT need more air flow UP. Those 2 fans will do the job. What you need when in a slide room, is for that hot convection air to easily go out the upper door. That 3rd fan blowing out does that job. Look at the pic prior to this post. Note the wood baffle in front on the condensor fins. THAT is not a proper install to make sure all bottom up cool air flow thru the fins. That gap between that wood and the rear edge of the fins does NOT allow all the air to flow thru the fins. That fan is too close to the fins to do a good job. Doug