Done this job a while ago. Went to fit a new cellar cooling system into a hotel. On Arrival found that the hotel handyman had rigged up his own cellar coolers. He had found some old fan motors and some small flexi ducting. As you can see he was hoping that the moving air from the fan would flow right up the flexi duct to outside. He even put some mesh around just for health and safety purposes. He said its worked really well but just doesnt quite get cold enough. Me and my boss struggled to keep straight faces! He took some pictures as well lol. Unbelievable!!!