Flow 5D Hydronic Heating System from Autoterm is a compact, diesel-powered hydronic heater engineered to keep engines ready and interiors cozy in the harshest conditions. This independent heating solution installs quickly in a wide range of vehicles, boats, and campers, integrating with your coolant circuit or central heating system to deliver warm air and pre-heat for reliable starts—even when the engine is off.

Key advantages that set Flow 5D apart

• Rapid, powerful warmth — up to 5 kW of heating power at 12V, enabling fast pre-heating of the engine and swift warming of passenger compartments.
• Engine protection in extreme cold — automatically helps the engine reach and maintain its proper operating temperature in temperatures as low as -45°C, reducing cold-start wear.
• Efficient, quiet operation — brushless induction motors deliver low noise and long life, even in demanding environments.
• Low fuel consumption — draws diesel at a maximum rate of 0.6 L/h, preserving fuel for travel while delivering dependable heat.
• Flexible installations — designed to be connected to the vehicle’s coolant system or a central heating loop for boats and campers, with a compact footprint ideal for tight spaces.
• No ducting required — a streamlined installation process that minimizes parts and complexity, plus the option to add an extra fuel tank if needed.

What’s included and how it’s ready to install

• Heater unit with integrated air intake and silencer
• Exhaust pipe and muffler
• Fuel intake and supply line
• Holder with shock absorber for vibration resistance
• Water circulation pump (D-7.09198.00.0) and TH11-4,4ml-12V fuel pump
• Air intake mounting kit and harness
• Mounting kits for cooling system, exhaust system, fuel system, heater and pump
• Heat insulation (28 x 5 x 450)

All components are selected to deliver a reliable, maintenance-friendly system that’s built to endure in cold climates and rugged environments.

Ideal use cases and who benefits most

• Overlanders and expedition travelers who park in remote areas and need a dependable heat source for cabin comfort and warm engine starts.
• RV, camper, and boat owners seeking efficient central heating and engine pre-heating without idling the engine.
• Fleet vehicles operating in cold seasons that require quick pre-heat to reduce start-up wear and keep compartments comfortable for drivers and passengers.
• DIY enthusiasts and installers looking for a robust, scalable heating solution with a broad compatibility in cooling and fuel systems.

How Flow 5D works and why it matters

As a hydronic heater, Flow 5D circulates heated coolant through the engine block and/or an external central heating loop. By pre-warming the engine, it eliminates the rough sounds and added stress associated with cold starts. At the same time, it channels warm air into living spaces, so you step into a ready-to-go interior even after long periods of freezing weather. When the engine is running, the system sustains a comfortable cabin temperature; when parked, it continues to maintain warmth for prolonged comfort.

Performance you can trust in extreme cold

Designed for harsh environments, Flow 5D operates reliably down to -45°C. The combination of a high 5 kW output, efficient diesel consumption, and a compact build means you get dependable heat without compromising space or fuel reserves.

Why this Flow model is a smart choice

• Targeted heat where you need it — engine pre-heat plus cabin warmth by design, with precise control to match your schedule.
• Low-maintenance, long-lasting — brushless induction motors extend service life and reduce wear, ensuring consistent performance year after year.
• Plug-and-play practicality — minimal ducting required and a streamlined kit that covers essential connections, simplifying installation in tight spots.
• Flexible installation options — compatible with vehicle coolant loops or central heating systems for boats and campers, plus an optional extra fuel tank for extended trips.

Practical tips for best results

Plan the installation to keep the exhaust and air intake clear of moisture and debris. Position the heater where vibration is minimized and the coolant lines can run with short, direct routing. If you’re integrating with a boat or camper heating loop, ensure the central system is sized to maintain comfortable temperatures across all cabins or compartments. Regularly check the fuel supply line and electrical connections to sustain peak efficiency in extreme cold.

Flow 5D Hydronic Heating System from Autoterm is a purpose-built solution for demanding climates, offering a reliable, efficient way to protect the engine and keep interiors toasty. It’s the smart, practical upgrade for anyone who travels, works, or lives in cold environments and needs warmth on demand.