A system, a device and a method for maintaining a consistent preset inflation of an air mattress inflated using a device having at least one sensor sensing relative humidity and temperature, and a controller activating a pump in response to a change in the ambient air condition, the sensor communicating to the controller, the controller selectively activating the pump in response to the change, the pump inflating the mattress to the preset inflation, maintaining consistent inflation of the air mattress. In one embodiment, the sensor communicates the ambient air condition to the controller wirelessly. The sensor is coupled to the controller and the controller is coupled to the pump operative to pump air into the mattress, the controller operative to activate the pump in response to the change in an ambient air condition, maintaining consistent inflation of the air mattress at the preset inflation chosen for comfort.