The invention provides a method for using an ozone generating apparatus containing a power supply apparatus and ozone generating device. The apparatus can be operated by controlling the power supplied from the power supply apparatus to the ozone generating device, supplying a flow of oxygen-containing gas to the ozone generating device, and controlling the flow of the oxygen-containing gas. The power supplied to the ozone generating device and flow of oxygen to the ozone generating device can be controlled to obtain a predetermined yield of ozone and to minimize the consumption of resources of the ozone generating apparatus.