Autoterm Flow 5D Hydronic Diesel Heater 24V for RV Campers

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

Why Flow 5D stands out

• Rapid, powerful warmth — up to 5 kW of heating power at 12V, enabling fast engine pre-heat and swift cabin warming.
• Extreme cold protection — automatically helps the engine reach and maintain proper operating temperature in temperatures as low as -45°C, reducing cold-start wear.
• Efficient, quiet operation — brushless induction motors provide long life and low noise 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 connect 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 — streamlined installation with fewer parts, 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)

Ideal use cases

• Overlanders and expedition travelers who park in remote locations 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 drivers and passengers comfortable.
• DIY enthusiasts and installers looking for a robust, scalable heating solution with 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 reduces rough cold starts and engine wear. At the same time, it channels warm air into living spaces, so you can step into a ready-to-go interior after exposure to freezing weather. When the engine is running, the system helps maintain a comfortable cabin temperature; and it can deliver warmth even when the engine is off, ensuring you stay cozy in parked scenarios.

Key specifications and benefits at a glance

• Heating capacity: up to 5 kW
• Power supply: 12V (system optimized for 24V vehicle applications per title)
• Diesel consumption: up to 0.6 L/h
• Cold-start protection: effective down to -45°C
• Installation: coolant integration or central heating loop with compact footprint
• Noise: low with brushless induction motors
• Maintenance: designed to be reliable and long-lasting in rugged environments