JP Heater air heater 4 kW 12V Diesel

The JP Heater 4 kW diesel air heater is an efficient and reliable solution for heating boats, motorhomes, vans, or workshops. It is designed to provide rapid heat – even in cold and humid environments – ensuring a comfortable temperature with low power and fuel consumption.

It's an ideal solution for those who want a stable heat source without relying on shore power.

⚡ Advantages

• Powerful 4 kW heating output – rapid heating
• 12V operation – perfect for boats and off-grid setups
• Low diesel and power consumption
• Stable operation in cold temperatures
• Compact design – easy to install
• Suitable for both recreational and professional use
• Good solution for boats, vans, camping, and small spaces

⛵ Suitable for

• Sailboats and motorboats
• Motorhomes and vans
• Allotment houses without permanent electricity
• Workshops and garages
• Hunting cabins and off-grid solutions

📊 Specifications

General

• Power: 4 kW
• Voltage: 12V DC
• Fuel: Diesel
• Heating type: Air heater

Fuel & consumption

• Fuel consumption: approx. 0.1 – 0.4 liters/hour
• Fuel tank (typical kit): approx. 5–10 liters
• Recommended fuel: Standard diesel

Power consumption

• Startup consumption: approx. 8–10 A
• Operating consumption: approx. 1–3 A
• Low standby consumption

Performance & capacity

• Heating area: approx. 10–40 m² (depends on insulation)
• Airflow: approx. 120–180 m³/hour
• Operating temperature: down to approx. -40°C

Dimensions & weight (estimated)

• Heater unit: approx. 32 × 12 × 12 cm
• Weight: approx. 4–6 kg

Connections

• Air intake and exhaust
• Diesel supply via pump
• 12V power connection

🔧 Installation

Installation is relatively simple and can be done by most people with a bit of technical understanding. The heater is typically mounted in a storage locker, under a bench, or in an engine compartment with proper ventilation.

It is important to:

• safely route exhaust out of the boat/vehicle
• ensure correct fuel supply
• use appropriate cable dimensions

📦 Package contents (may vary slightly depending on model)

• Diesel air heater unit
• Fuel pump
• Exhaust pipe
• Air hoses and fittings
• Mounting parts
• Control panel

💡 Tip from SejlStrøm

If you use the heater in a boat, I recommend combining it with a lithium battery and possibly solar panels. This provides a solution where you can stay warm for longer without starting the engine.