Suburban Mfg 5186A Nautilus IW60 Tankless On-Demand LP Gas RV Water Heater 60,000 BTU

The Suburban Mfg 5186A Nautilus IW60 is a tankless, on-demand LP gas water heater engineered specifically for RV use. Also referenced under part numbers 5286A, IW60, and 5581A, this unit delivers continuous hot water without a storage tank, eliminating the wait time and energy waste associated with conventional tank-style heaters.

Key Features:

• 60,000 BTU Output: Exclusive 2-Stage Modulating Combustion System (MCS) self-modulates between 15,000–60,000 BTU/h to precisely match demand
• Consistent Temperature Control: Microprocessor-controlled MCS monitors inlet water temperature and flow, output temperature, heat exchanger, and burner operation — instantaneously adjusting LP gas input to eliminate temperature fluctuations
• On-Demand Operation: Activates only when hot water is needed, improving energy efficiency over traditional tank heaters
• Temperature Range: Adjustable output from 95°F to 130°F maximum
• Water Flow Range: Operates from 0.5 to 1.5 GPM inlet water flow
• Dual Ignition: State-of-the-art 3-Try Direct Spark Ignition with Pilot backup for safe and reliable operation
• Freeze Protection: Equipped with both powered and non-powered freeze protection for reliable performance in cold weather conditions
• Durable Construction: Porcelain-lined steel heat exchanger with anode rod to resist electrolytic action and extend service life
• Compact and Lightweight: Weighs just 36 lbs. with vent assembly; fits in tight RV compartments
• Flexible Installation: Installs with or without an access door; door, frame, and vent cap are sold separately

The Nautilus IW60 runs on LP gas and is designed for straightforward installation in most RV applications. If replacing an existing water heater, a compatible retrofit access door kit and wall vent are required. A Control Center (sold separately) is also needed when replacing a different brand or model. Cross-reference part numbers: 5186A, 5286A, IW60, 5581A, ST-60.

Note: Access door/frame, thermostat control, and vent cap are not included and must be purchased separately. Comes with a 2-year manufacturer's warranty.