Leaving a bounce house inflated for more than 12 hours can cause your electricity bill to skyrocket and reduce the life of the fan. Additionally, you need to be aware of nighttime visitors. To ensure everything is in order, store all the bouncy house accessories in a separate bin near the bouncy house in the garage. A 1200 watt (1.5 HP) inflatable inflatable house fan (link to Amazon) should work for most commercial and residential inflatable houses. Before anyone can enter the bouncy house, it must be anchored.
For more detailed instructions on the location of bouncy houses, check out my guide Places to Set Up a Bouncy House.