We rent generators to power anything we rent. If you are renting our photo booth or our movie screen packages and require a generator you need the electronics only generator. Anything else we rent will be ok with a general purpose generator. For the movie screens though you will need to rent both types of generators. Our large generator will run 3 or 4 bounce house blowers at a time. The medium will handle 2 blowers and the small will only handle 1 blower. They all will run approximately 6 hours on a tank of gas. If your rental is longer than that be sure to have extra gas available to you so that you can continue to enjoy your event uninterrupted. Even if your event isn't longer than 6 hours you should keep some extra gas on hand, we do not guarantee how long the tank of gas will last because it can vary greatly depending on weather and the amount of the load put on the system by the electrical devices you are using.