4kW Gasoline Combi Heater

4kW Gasoline Combi Heater with 10L Hot Water Boiler

The Sparks Overland 4kW Gasoline Combi Heater delivers reliable cabin heat and on-demand hot water from a single compact system. Designed for motorhomes, campers, trailers, expedition vehicles, and other enclosed overland builds, it provides efficient gasoline-powered heating while supplying a built-in 10-liter hot water tank for showers, dishes, and everyday camp use.

With Gasoline, Electric, and Hybrid operating modes, you can choose the most efficient power source for your adventure. When shore power is available, the heater can operate on 110V electric power, reducing fuel consumption while maintaining comfortable temperatures and hot water.

Built for Four-Season Camping

Whether you’re camping in freezing temperatures or spending weeks off-grid, this all-in-one system keeps your living space warm while providing a dependable supply of hot water.

The integrated altitude sensor automatically adjusts fuel delivery at elevations up to 16,400 ft (5,000m), eliminating the need for manual altitude adjustments.

Features

• 4kW gasoline air heater with integrated 10L hot water boiler
• Automatic high-altitude operation up to 16,400 ft (5,000m)
• Three operating modes:
• Gasoline Mode
• 110V Electric Mode (900W or 1800W)
• Hybrid Mode (Gasoline + Electric)
• Heat, hot water, or both at the same time
• Automatic temperature regulation
• Designed for RVs, camper vans, trailers, overland vehicles, and expedition builds
• Low fuel consumption with excellent heating efficiency
• Quiet operation
• Compact all-in-one design

Three Operating Modes

Gasoline Mode

Provides full heating and hot water using gasoline, making it ideal for off-grid camping.

Electric Mode

When connected to shore power, choose between 900W or 1800W electric heating to reduce fuel usage.

Hybrid Mode

Automatically combines gasoline and electric power for maximum efficiency and faster heating when needed.

Technical Specifications

Heating Output: 4kW

Fuel Type: Gasoline

Fuel Consumption: Approximately 0.11–0.51 L/hr (depending on operating mode)

Voltage: 12V DC

Operating Voltage: 10.5–16V

Water Tank Capacity: 10 Liters

Electric Heating: 900W / 1800W (110V)

Maximum Warm Air Output: 287 m³/hr

Operating Altitude: Up to 16,400 ft (5,000m)

Operating Temperature: -13°F to 176°F (-25°C to 80°C)

Weight: 15.6 kg (34.4 lbs) without water

Dimensions: 510 × 450 × 300 mm

Installation Notes

• Connect the heater directly to a 12V battery using the supplied power leads.
• Fuel can be supplied from the vehicle’s gasoline tank or an optional auxiliary tank.
• The fuel pump should be installed between 15° and 35° for optimal performance.
• In freezing conditions, drain the water tank before storage to prevent freeze damage.

What’s Included

• 4kW Gasoline Combi Heater
• Integrated 10L Hot Water Boiler
• Electronic Controller
• Fuel Pump
• Installation Hardware
• User Manual

Important

This heater is designed for installation in motorhomes, camper vans, trailers, and enclosed overland vehicles. It is not intended for buses or vehicles transporting hazardous materials.

As with all combustion heaters, proper installation and ventilation are essential. Please read the installation manual completely before use.

Why We Chose This Heater

There are plenty of gasoline heaters on the market, but very few combine dependable cabin heat, automatic altitude compensation, and a true hot water system into one compact package.

For travelers who want warm nights, hot showers, and fewer components to install, this combi heater is one of the cleanest all-in-one solutions available.