Raxial S4 - Inline Duct Booster Fan with Speed Controller 4" dupe Up to four sensors can

Up to four sensors can be used per dehumidifier

When Purchasing the new Quantanium Tumbler please make sure you have the new blade design which was released April 2015

9-inch SK5 Japanese high carbon steel blade

Comes with 1 tubing adapter

Raxial S4 - Inline Duct Booster Fan with Speed Controller 4" dupe Up to four sensors canA duct fan designed to boost airflow in HVAC systems and ventilate home spaces like attics and workshops. Features a variable fan speed controller, enabling you to optimize airflow and noise level for any application. Unibody die cast construction with no welded seams; reduces vibration while ensuring smoother airflow. AC brushless motor with steel blades and lubricated bearings; not suitable in restricted airflow applications. Duct size: 4