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.

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.

NOTE: When purchasing this system, the door panel, vent and control panel do not come with it. These are purchased separately.  Please ensure to order these parts when ordering the Suburban Nautilus On Demand System. 


2 Years Warranty

Suburban’s NAUTILUS On Demand Water Heater - developed with INDUSTRY-BEST:

  • Exclusive 60,000 BTU Two-Stage Self Modulating Combustion System
  • Built-In Freeze Protection
  • Only 16.3kg Installed (including optional accessories)
  • Two-Year Warranty

The EXCLUSIVE 2-Stage Modulating Combustion System (MCS) Monitors:

  • Inlet water temperature
  • Inlet water flow
  • Output water temperature
  • Combustion air fan speed
  • Heat exchanger & burner operation




Nautilus IW60A, 5187A


64 (5) burners


Self Modulating Combustion System


Stage 1 Operation: 2 Burners

Stage 2 Operation: 5 Burners

Fuel Source

Universal LP Gas

Dry Weight

15 kg with vent assembly

Optional access panel 2.3 Kg shipping weight


2.1 AMPS

Operational Voltage Range

10.2 - 14.5 VDC

MAXIMUM Output Water Temperature


Output Water Temperature - Factory Setting


Digital Control Center Temperature Range

35° - 50° (C)

Liters Per Minute (LPM) Required Flow

1.9 LPM

Freeze Protection



2 - Year

Product Dimensions

316.6 mm W x 317.8 mm H x 464.9 mm D

(includes inlet & discharge water lines)

SKU 950-03000
Brand Coast2Coast
Shipping Weight 17.0000kg
Shipping Width 0.570m
Shipping Height 0.390m
Shipping Length 0.390m
Shipping Cubic 0.086697000m3

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