CONVERTS THE AIR OUTLET TO BE COMPATIBLE WITH 8"" WIDE BY 16' LONG FLEXIBLE DUCTING. DUCTING EASILY CONVERTS AIR SCRUBBER (SOLD SEPARATELY) TO A NEGATIVE AIR MACHINE WITH CONVENIENT FLEXIBLE DUCTING. THIS PRODUCT HAS A 12-MONTH MANUFACTURER'S LIMITED WARRANTY FOR PARTS AND A 12-MONTH MANUFACTURER'S LIMITED WARRANTY FOR LABOR. PROTECT YOUR PURCHASE BEYOND THE MANUFACTURER'S LIMITED WARRANTY.