iMass Instantaneous LPG/Gas Water Heater

Instant LPG Water Heater – Tankless Hot Water System (IWH-1.5 E)

Upgrade your setup with the IWH-1.5 E Instant LPG Water Heater, delivering instant, continuous hot water without the need for a storage tank.

Designed for motorhomes, campervans, and horseboxes, this compact system provides reliable hot water on demand — perfect for showers, washing up, or connecting to outdoor shower points.

Enjoy the comfort of home wherever you travel, with efficient gas usage, quiet operation, and precise temperature control in a smart, space-saving design.

Key Features & Benefits

• Instant unlimited hot water – No tank, no waiting, no running out
• High efficiency performance – Up to 92% efficiency
• Reduced gas consumption – Uses up to 60% less gas than tank systems
• Digital temperature control – Adjustable from 35–60°C via remote panel
• Automatic operation – Activates when water flow is detected
• Quiet operation – No standby heating noise overnight
• Compact & lightweight – Ideal for space-limited installations
• Outdoor compatible – Suitable for external shower outlets
• Hygienic design – No tank means no corrosion or Legionella risk

Product Specifications

• Fuel Type: LPG (Propane G31 / Butane G30)
• Voltage: 12V DC
• Maximum Burner Output: 10 kW
• Minimum Burner Power: 5 kW
• Gas Consumption (Full Load): 765 g/h
• Gas Pressure: 30 mbar
• Efficiency: Up to 92%
• Water Temperature Range: 35–60°C
• Typical Flow Rate: 5 L/min
• Temperature Rise @ 3.3 L/min: 37.7°C
• Maximum Water Pressure: 5.0 bar
• Startup Time: <60 sec (typically ~10 sec)
• Typical Exhaust Gas Temperature: ~90°C

Electrical Details

• Supply Voltage: 10.5–15V DC
• Current Consumption: 0.44 A
• Power Consumption (Operation): 5.28 W

Dimensions & Weight

• Weight: 12.1 kg
• Outer Panel Size: 380mm x 380mm
• Wall Cut-Out Size: 330mm x 330mm

Built for Mobile & Off-Grid Living

• High-efficiency copper heat exchanger
• Modulating burner with microprocessor control
• Highly efficient exhaust blower
• CE approved for safety and reliability
• Designed specifically for leisure vehicles

Why Choose Tankless?

Unlike traditional tank heaters, this system heats water only when needed:

• No wasted energy
• No heat loss overnight
• Unlimited hot water supply
• Faster and more efficient operation

Ideal For

• Campervans & motorhomes
• Horseboxes
• Off-grid builds
• Outdoor shower systems
• Touring and adventure vehicles