Allows CellarPro 1800H Houdini cooling units to be ducted up to 50 equivalent feet (25 feet per duct) per side (hot or cold or both) using 6-inch ducting (sold separately) with no reductions from start to finish .

• Designed to work with hot-side airflow openings on the 1800 Houdini cooling unit

• Ducting is not included

• Includes 2 register grills measuring 6 x 12 (inches), one with a filter screen for fresh air intake.