JP Heater Diesel water and air heater 4 kW 12V – for Camper & Boat

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Installation

Installationen kræver lidt mere end en almindelig luftvarmer, da både luft, diesel og vand skal tilsluttes – men det er stadig overskueligt for mange.

Det er vigtigt at:

• føre udstødning korrekt ud
• sikre korrekt dieseltilførsel
• installere vandtilslutninger og evt. trykpumpe korrekt
• sikre god ventilation omkring enheden

JP Heater 4 kW diesel is a complete heating solution for those who want both cabin heating and hot water in one and the same unit – without being dependent on gas.

It is particularly suitable for boats where diesel is already on board, and where you want a simple, safe, and efficient solution for both heating and hot domestic water.

With 4 kW of heating power, it delivers stable heat in small to medium-sized installations, while simultaneously producing hot water for bathing, dishwashing, and daily use.

⚡ Advantages

• Combines air heating and hot water in one unit
• Runs on diesel – easy integration into a boat or vehicle
• 12V solution – perfect for off-grid setups
• Low power consumption and efficient operation
• Stable heat in cold and damp environments
• Eliminates the need for gas installation
• Compact and space-saving solution
• Ideal for boats, vans, and smaller installations

⛵ Suitable for

• Sailboats and motorboats
• Campervans and vans
• Small off-grid cabins
• Allotment houses without gas installation
• Those who want one complete solution for heat and water

📊 Specifications

General

• Output: 1 / 2 / 4 kW (stepwise adjustment)
• Voltage: 12V DC
• Fuel: Diesel
• Heating type: Air + water

Fuel & consumption

• Fuel consumption: approx. 0.12 – 0.4 liters/hour
• Fuel pump: electronic dosing pump
• Fuel type: Standard diesel

Power consumption

• Start-up consumption: approx. 8–10 A
• Operating consumption: approx. 1–3 A
• Low standby power

Heat output (air)

• Airflow: approx. 120 – 200 m³/hour
• Multiple air outlets for even heat distribution

Water & hot water function

• Integrated hot water tank: 10 liters
• Water temperature: approx. 40°C – 60°C
• Max. water pressure: approx. 2.5 – 3 bar
• Ready for bathing, dishwashing, and daily use

Dimensions & weight (estimated)

• Dimensions: approx. 450 × 300 × 300 mm
• Weight: 13 kg (without water)

Operating conditions

• Operating temperature: down to approx. -40°C
• Stable operation in damp and cold environments

Control

• Digital control panel
• Temperature control
• Timer function
• Automatic error detection

🔧 Installation

Installation requires a little more than a standard air heater, as air, diesel, and water must all be connected – but it is still manageable for many.

It is important to:

• route the exhaust out correctly
• ensure correct diesel supply
• install water connections and any pressure pump correctly
• ensure good ventilation around the unit

📦 Package contents (may vary)

• Diesel water and air heater unit
• Fuel pump
• Exhaust system
• Air hoses and distributors
• Water connections
• Control panel
• Mounting parts

💡 Tip from SejlStrøm

This model is ideal if you want to keep it simple and run a 100% diesel-based setup on board.

I typically recommend combining it with:

• a lithium battery (low power consumption = longer operating time)
• solar panels to keep the system running without the engine

Then you have a solution where you have both heat and hot water – completely independent.