#3410: 3″ Warm Air Duct (25′)$250.00 #3410: 3" Warm Air Duct (25') quantity Add to cart Related products Add to cart #2460: Exhaust Vent (closeable duplex) $271.00 Add to cart #1029: 28mm Exhaust Insulation (per foot) $5.00 Add to cart #3417: Bulkhead fitting $40.00