Suburban Furnace SF-42VHQ AirXCel SF-42Q SFV-42Q 2592A 40K BTU 12VThe Suburban SF 42VHQ Furnace provides maximum heating performance in a ducted unit with a 40,000 BTU h capacity. Yet at only 7. 5" high, it can be easily installed in areas that might otherwise be left unused. With nine duct connection choices (top, front, side, and bottom), the SF 42VHQ offers almost unlimited design flexibility in mid size and large RVs. The SF 42VHQ Model features top or side rear gas and electrical connections with an exterior