Product Type Venting For Gas Heaters Compatible with Product Type Dayton Infrared Tube Heaters Opening Height 4 in Opening Width 4 in Opening Depth 6 in Mounting Type Flange-Mount Vent Direction Horizontal or Vertical Vent Length 14 in Vent Size 4 in Vent Type Dual Sidewall Venting Material Galvanized Steel Outer Diameter 6 in Overall Length 14 in Includes 16 ga Aluminized Steel 4 x 4 x 6 in OD Y-shaped Fitting Standards UL Listed