Donald: Thank you for contacting Porch. More information is needed to answer your question. We need to know the amperage draw on the label of each AC unit, then the amperage rating of the breaker for the circuit you expect to connect to. Keep in mind initial inrush amperage will be higher so don't turn both on at the same time. You might consider plugging into separate circuits to help avoid tripping a breaker. Since a breaker can be easily reset you might just try it and see if it works, if the breaker trips you know there is an issue and simply reset the breaker.