SF42FQ 40,000 BTUs Suburban Ducted Furnace   Versatile, low profile furnaces offer maximum ducted heating for mid-size and large RVs. Designed for interior serviceability with a front (inside) gas connection and a small vent terminal on the coach exterior, these furnaces can be installed up to 9" from the wall. Since no exterior access door is required, the SF-F is aesthetically appealing and a more economical installation choice.   Depth (IN): 20 Inch Type: LP Gas BTU Level: 40000 BTU Stage: Single Discharge Type: Direct Discharge Ignition Type: Direct Spark Ignition Width (IN): 17 Inch Height (IN): 7-1/2 Inch With Vent Assembly: Yes With Access Door: No