Yes, Airchamber units need to be located near a 120V (ideally a grounded outlet) power source for the transformer that powers the high-efficiency fans that keep the air circulating. It is also recommended to use a powered air pump or vacuum to initially inflate your Airchamber. Although you can inflate your Airchamber using the supplied fan and power supply, it is quicker to do so using the previously mentioned methods. The fans cost approximately $10 - $12 dollars a year to operate.