Suburban Nautilus On Demand Instantaneous Hot Water Heater

Turn the tap and get hot water straight away, no waiting, no running out. The Suburban Nautilus is built for caravan and RV use, giving you continuous hot water on demand, just like home.

No tank means no recovery time. You’re not heating and reheating water all day—you’re only heating it when you need it. That means better efficiency, less gas use and fewer maintenance issues compared to old storage systems.

If you’re upgrading from a Suburban tank unit, this is a straightforward swap, using the same cut-out size

How It Works:

The Nautilus uses a 60,000 BTU two-stage burner system:

• Low demand = 2 burners (saves energy)
• High demand = 5 burners (keeps water hot at higher flow)

It automatically adjusts in the background, so you get a steady, comfortable temperature without constantly fiddling with taps.

Features:

• nsItant, continuous hot water

• Tankless design – no recovery time
• Suits standard Suburban cut-out (easy upgrade)
• Two-stage modulating burner system
• Built-in freeze protection
• More efficient than storage tank systems
• Optional digital control panel for temp adjustment
• Designed for caravans, campers and RVs

Specifications:

Brand: Suburban

Fuel Type:
LP Gas

Output:
60,000 BTU

Temperature Range:
35°C – 50°C (with optional controller)
Factory set: 50°C

Minimum Water Flow:
1.9 L/min

Performance:
+38°C rise at 5.7 L/min flow

Dimensions:
317 mm (W) x 318 mm (H) x 465 mm (D)

Weight: 16kg

Important Instilation Notes: 

• Fits same cut-out as Suburban 22.6L tank systems
• Requires vent installation (not included)
• Door panel may be required for replacements
• No external access door needed for new installs

Please Note: Control panel, vents and access doors sold separately, see hot water spare parts

FAQ

Will I ever run out of hot water?
No. As long as you have gas and water flow, it runs continuously.

How hot does it get?
Adjustable from 35°C to 50°C (with optional control panel).

What do I need to buy separately?
• Vent kit (required)
• Door/panel (for replacements)
• Digital control panel (recommended)

Can I install it myself?
No , must be installed by a licensed gas fitter.

Does it need a vent?
Yes ,  a Suburban vent is required and must match your wall thickness.

What power does it need?
• 12V DC (for ignition/control)
• Gas (LPG) for heating

Why does temperature fluctuate?
Usually caused by low or inconsistent water flow.
This unit needs a minimum 1.9 L/min flow to operate properly.

Quick tip for best performance
Turn hot tap on first, then adjust with cold.
Do not “pulse” the water flow.