Suburban LP RV Furnace 19,000 BTU NT-20SEQ 2501ABKSuburban Furnace 2501ABK 19,000 BTU (NT 20SEQ) NT SEQ models are direct discharge furnaces with attractive grilles for zone heating of smaller RVs, trailers, truck campers and even pop ups. An optional side duct is available on this model for additional distribution of warm air. Depth (IN): 22 3 8 Inch Type: LP Gas BTU Level: 19000 BTU Ignition Type: Electronic Ignition via 12V Width (IN): 9 3 8 Inch Height (IN): 9 1 2 Inch With Vent Assembly: Yes