Replaces aluminum tank water heaters and delivers 12% more BTU/h. Porcelain steel lined tank is built just like longer lasting residential tank water heaters. At 10, 000 BTU/h, they deliver 12% more BTU/h input than aluminum tank models. Industry exclusive flue tube baffles slow combustion process to transfer more heat to water in tank. Anode rod protects against tank corrosion and doubles as a drain. The one-piece, die-formed housing protects controls and connections yet offers easy access. Fits cut-out openings of prior models. Access door and frame (sold separately) are easily installed on any type RV side. An inside-mounted switch (sold separately) provides convenient control. Note: Gas appliances should be installed and/or serviced by a qualified service technician. Large diameter drain Replaceable anode rod | Suburban Advantage 6 Gallon Water Heater, Propane Only with Direct Spark Ignition