The Hydra Replacement External Fan – Small is a useful accessory for enhancing air circulation within smaller humidors, such as those using the Hydra SM humidification system. Designed as an optional component, this fan plugs into a port already present on many Hydra SM units, enabling improved humidity distribution in cabinets or desktop humidors up to about 8 cubic feet. Its installation is straightforward: attach the fan, connect via splitter/ribbon cable (if using multiple fans), and orient it to blow airflow across your cigars. The fan runs quietly and steadily, ensuring more uniform moisture distribution and helping to prevent dry spots that could degrade cigar quality.  Because ambient airflow can be uneven in larger humidors even with a single humidifier, this replacement external fan is particularly effective in promoting consistent RH (relative humidity) levels. Overall, the Hydra SM Small External Fan is a modest-cost upgrade for anyone with mid-size cigar storage, enabling better preservation of aroma, texture and burn quality by keeping temperature and humidity more evenly balanced.