Abstract: An automatic door opener is attachable to at least one manual door and an automatic door. The automatic door has a closed position and an open position. The automatic door opener includes an opening actuator, a pressure reservoir and a door activator. The opening actuator is operably connected to the automatic door. The pressure reservoir system is operably connected to the opening actuator, operably connected to the manual door, and operably connected to the automatic door. Movement of the manual door adds pressure to the pressure storage reservoir system. The door activator has an at rest position and an open position whereby pressure from the pressure reservoir system is released to the opening actuator moving the automatic door from a closed position to an open position responsive to movement of the door activator form the at rest position to the open position.