Yes. A fan keeps air circulating in the bounce house at all times. Once disconnected, they collapse. That is why we necessitate an electrical outlet within 100 feet of the unit or a power generator. After your event, we ask that you please leave your rental inflated until we arrive. We will inspect and properly deflate it when we arrive. Only in the case of high winds do we ask that you please turn off the blower to deflate the inflatable.