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Suburban Nautilus Instant Gas Hot Water System 60,000 BTU · Unit Only

6 Reviews
$1,675.10$1,410
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Order now for estimated dispatch on 7th Oct 2026.

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Description

Brought to you by industry favourite Suburban, the Nautilus instant gas hot water system allows you to enjoy instant and endless hot water in your Caravan or RV. Suburban are well known in the Australian and American RV market for their affordable, quality units and the new 'on demand' system is no exception.

The Nautilus fits the same size cutout as their standard 22.6 L tank systems and is an easy slide in upgrade. The tankless system means no recovery time, greater energy efficiency and less maintenance than its storage tank counterparts.

The 60,000 BTU two-stage modulating combustion system instantly adjusts the gas input to provide a consistent output temperature, while conserving energy. The first stage uses just two burners, saving energy while the second stage uses five burners allowing for maximum temperature gain even with higher flow rates.

When used with the Digital Control Center (available separately) you are able to easily adjust the output temperature between 35-50 degrees Celsius.

Installation

Since the tankless system does not require any access from the outside of the vehicle, new installations only require the vent (not included) to be installed through the RV wall. If replacing an existing unit with an access door, replacement panels are available to suit standard Suburban and Atwood cutouts.

The replacement panels do not include a vent, which must be purchased separately to suit the vehicle's wall thickness.

PLEASE NOTE: The unit does not come with a vent or door panel - these must be purchased separately to suit your setup. Vents and doors can be found below in related products.

Features

  • Continuous, Instant Hot Water
  • Suits common Suburban cutout
  • Selectable water temperature from 35 to 50 degrees Celsius (with optional controller - sold separately)
  • Two-stage self modulating combustion system - for consistent output temperature
  • Built-in Freeze Protection
  • Energy efficient - only heats when in use
  • 2 year warranty.

Specifications

  • Manufacturer Part Number: 5187A
  • Other Identifier: IW60A
  • Brand: Suburban
  • Barcode: 755790707218
  • Fuel Source: LP Gas
  • Dimensions: 317 mm (w) x 318 mm (h) x 465 mm (d) - includes inlet & discharge water lines
  • Output temperature: Continuous 35-50 degrees Celsius (factory set 50-degree output)
  • 60,000 BTU two-stage heating
  • Minimum starting water flow: 1.9 L/min
  • Temperature rise @ 5.7 L/min flow: 38 degrees Celsius

    Does not include:

  • Digital Control Panel (Recommended)
  • Vent (Required - select correct option for wall thickness)
  • Door (Not required for new installations)
  • Shipping Weight: 16.20 Kgs.
  • Shipping Dimensions: 57 cm x 39 cm x 39 cm.

Further Information

Video Guide

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Compare Caravan & RV Instant Caravan Hot Water Heaters

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Caravan Hot Water Systems Explained: Storage vs Instant vs Compact Electric

Caravan Hot Water Systems Explained: Storage vs Instant vs Compact Electric

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Suburban Hot Water System Maintenance

Suburban Hot Water System Maintenance

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Suburban Nautilus Instant Gas Hot Water System - 60,000 BTU - Unit Only

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Ask us before ordering. If you buy the part we confirm for your setup and our recommendation is wrong, we’ll cover return postage and delivery of the correct replacement.

If we can’t supply a suitable replacement, we’ll refund the part.

We’ll explain any difference in the replacement part’s price before arranging the swap.

The promise applies to the setup and details we checked. If we can’t confirm suitability, we’ll say so before you buy. This is additional to your existing consumer rights.

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