Our hvac slab duct Products Locate Dealer In Slab Duct $1.00 Inlet Boot $1.00 Plastic Chair Support Bracket $0.00 Slab Connecting Collar $1.00 Slab Elbow $1.00 Slab Grill $1.00 Soffit Discharge $1.00 Wall Cap $1.00 Wall Discharge $1.00