The specially designed Model AFH2 Air Flow Hood measure volumetric air flow from diffusers, grilles and registers. AFH2 Air Flow Hood helps to maintain running average of measurements in the desired units. Using a manometer, the flow hood's measurements can be manually recorded on a given time period. The highly accurate digital manometer comes with an auto-zero feature and will auto-zero at user-defined intervals. The digital manometer with its magnet back-plate easily mounts to the flow hood. The device can be easily dissembled without any tools. The unit also alerts during low battery levels to prevent recording of inaccurate measurements. The durable light weight flow hood can be easily stored into an included travel case.