This particular *kit is for a single fan unit meant to cool your cabinet, multimedia center, aquarium, home grow op, brewing project or whatever else that may need cooling, the only limit is your imagination! This fan can move 46 cubic feet (WxHxD) of air per minute (CFM) which is good for 1-2 components (up to 10 cubic feet of space with 1 shelf), this is just a general rule of thumb and it assumes you have adequate space for air to flow in from, and ventilation between shelving, we're currently working on an in depth guide to airflow and cooling Can be mounted on any side of a cabinet, where room permits (cutout dimensions below). Insert completed cooler assembly in hole and attach with appropriate screws. Fan can be set to be either an intake or exhaust, simply mount the fan to the bracket pointing in the desired direction before installing (if you are looking at the label the air will flow towards you)