A window unit for receiving a package from an aerial vehicle to a window of a building. The window unit includes a frame and a net. The frame is coupled to a building wall and a window ledge. The net is coupled within the frame. The net receives delivery of the package. The window unit includes sensors and communication devices to confirm alignment of the package and effectuate delivery of the package. The window unit includes a release device for releasing the frame or net if there is a snag with the package or aerial vehicle. A method of delivering a package to the window unit includes confirming the package is aligned with the net prior to release of the package from the aerial vehicle.