Product Type Venting For Gas Heaters, Compatible with Product Type Unit Heaters, Compatible Grainger Part Number 55GY97, 55GY98, Compatible Mfr. Model Number 11HU300A1NS1110A, 11HU400A1NS1110A, Opening Width 4 in, Opening Depth 4 in, Mounting Type Surface, Vent Direction Horizontal or Vertical, Vent Diameter 4 in, Vent Size 4 in, Vent Type Intake/Vent Concentric Y, Material PVC, Outer Diameter 4 in, Includes Air Inlet Pipe, Combustion Air Inlet Cap, Flue Pipe, Intake/Vent Concentric Y
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