JP Heater water-based diesel heater 5 kW

The JP Heater 5 kW waterborne diesel heater is a powerful and professional heating solution for those who want central heating-like comfort in a boat, camper, or off-grid installation.

Instead of blowing hot air, this heater warms water (coolant) that circulates through radiators, underfloor heating, or fan heaters. The result is more even, quieter, and comfortable heat throughout the entire installation.

This is the solution for those who want to build a proper heating system – not just a quick fan heater.

⚡ Advantages

• Waterborne heat – even and comfortable heating
• Powerful 5 kW heating output
• Diesel operation – perfect for boats and vehicles
• Less noise than traditional air heaters
• Can be connected to radiators, underfloor heating, and hot water tank
• Suitable for larger and permanent installations
• Professional solution with high comfort

⛵ Suitable for

• Sailboats and motorboats with heating systems
• Motorhomes and expedition vehicles
• Off-grid cabins with central heating
• Workshops and larger spaces
• Those who want home-like comfort

📊 Specifications

General

• Power: 5 kW
• Voltage: 12V DC (often also in 24V version)
• Fuel: Diesel
• Type: Waterborne diesel heater

Fuel & Consumption

• Fuel consumption: approx. 0.2 – 0.6 liters/hour
• Fuel pump: electronic dosing pump
• Fuel type: Standard diesel

Power Consumption

• Starting consumption: approx. 8–12 A
• Operating consumption: approx. 1–4 A

Heat Output

• Heats water/coolant to approx. 70–80°C
• Suitable for closed circuits
• Stable heat for multiple heat sources

System Integration
Can be connected to:

• Radiators
• Underfloor heating
• Fan coils (fan heaters)
• Hot water tank

Dimensions & Weight (estimated)

• Dimensions: approx. 35 × 15 × 20 cm
• Weight: approx. 5–7 kg

🔧 Installation

This type requires a correctly built waterborne system:

• Circulation pump
• Expansion tank
• Hoses and distributors
• Correctly routed exhaust

It's a bit more advanced than an air heater – but in return, you get significantly better comfort.

📦 Package Contents (may vary)

• Waterborne diesel heater
• Fuel pump
• Exhaust system
• Mounting parts

(Circulation pump and heating system typically not included)

💡 Tip from SejlStrøm

If you're in doubt, here's a really good rule of thumb:

• Air heater → fast and simple heat
• Waterborne heater → comfort and "real heat"

This type is perfect if you:
✔ spend a lot of time on the boat
✔ want an even temperature
✔ are considering hot water in the same system

A good rule of thumb:

• 5 kW → smaller boats / simple systems
• 9 kW → larger boats / full comfort solution