Suburban Nautilus On Demand RV Water Heater For Campers And RVs

Meet the Nautilus On Demand RV Water Heater from Suburban — the direct water heater that delivers endless hot water on demand, with no storage tank to heat. Say goodbye to waiting for hot water to reheat in a conventional tank, and say hello to the freedom to shower, wash dishes, and even run laundry with an infinite supply of hot water wherever you are.

On-Demand Performance that weighs less, works smarter

• No storage tank means reduced weight and no standby heat losses — the NAUTILUS only runs when you need hot water, improving overall efficiency.
• Exclusive 60,000 BTU Two-Stage Self Modulating Combustion System (MCS) continuously adapts LP gas input to match your hot water demand for consistent comfort across all fixtures.
• Built-in freeze protection guards against cold-weather use, helping prevent damage and ensure dependable operation when RVing in chilly conditions.
• State-of-the-art 3-Try Direct Spark Ignition provides safe, reliable startup.

Key specs you can rely on

• Weight: 36 pounds (with vent assembly)
• Installed size: 318 x 318 x 521 mm (H x W x D)
• BTU: 60,000
• Two-Year Limited Warranty
• Water heater only — flue kits available as add-ons

Why this RV water heater stands out

Unlike bulkier, storage-tank models, Nautilus On Demand focuses heat exactly where and when you need it. The result is a lighter install, faster response to hot water calls, and the ability to run multiple fixtures at once — showers, sinks, and laundry — without sacrificing temperature or flow. The combination of MCS modulation, direct ignition, and freeze protection offers a practical, reliable solution for campers and RVers who value freedom, efficiency, and performance.

Ideal use cases

Perfect for full-time RVers and weekend explorers alike, it supports:

• Endless showers and baths without waiting for reheating
• Dishwashing and laundry with hot water available simultaneously from every fixture
• Safe, reliable operation in varying climates thanks to integrated freeze protection

What’s included and compatibility

The Nautilus On Demand system is the water heater unit itself. Flue kits are available separately to complete the installation as needed for your RV setup.