Suburban SF-30VHQ 30,000 BTU Ducted Horizontal Vertical RV FurnaceHeat your mid size or large RV reliably with the Suburban SF Q Series Furnace, a ducted 30,000 BTU h propane furnace engineered for maximum heating performance and flexible installation. With both horizontal and vertical mounting options, the SF Q can tuck into compartments and corners that might otherwise go to waste a real advantage when you're working with the tight, irregular spaces typical of RV builds. Solid Heating Performance for Bigger Rigs