OK, this is how the RV refer works. You have the Evap fins. The air must flow up from bottom thru the fins to remove the heat. So, ANYTHING that helps move that air is a good thing. BUT, moving the air too FAST will not remove the heat correctly. The air flows from convection. Hot air rises. That is why it is important to NEVER block the back wall of the refer with items that will stop the flow of this air, Plastic bags and such are a no-no against the back wall. Those fans can help as long as they are installed at the lowest point and BELOW the Evap fins. DO NOT install in correct place and they are useless. Doug