Enjoy endless hot water with Suburban’s NAUTILUS On Demand RV Water Heater. Say “good-bye” to waiting for water to reheat in a conventional tank. Product Description Showers and baths are best enjoyed slowly, so LIVE FREE from the restraints of limited hot water supplies. Dishes and even the laundry can be done with an infinite supply of hot water whenever and wherever, simultaneously from every fixture. With no storage tank to heat water, the NAUTILUS On Demand RV Water Heater reduces weight and increases efficiency by only operating when the need for hot water arises. The NAUTILUS On Demand RV Water Heater uses an exclusive 60,000 BTU 2-Stage Modulating Combustion System (MCS) which instantaneously adjusts the LP gas input to provide consistent and endless comfort regardless of your hot water needs.