Eberspächer Hydronic HS3 B4E 12V CL

Hydronic HS3 B4E 12V CL (FL2020)

Product number: 02049050000

The Hydronic HS3 B4E is a third-generation fuel-powered water heater from Eberspächer , developed for efficient preheating of both the engine and the passenger compartment. With a heating output of up to 4.3 kW, the system ensures rapid heating and efficient defrosting of windscreens. In motorhomes, the heater can also be used to heat domestic water.

The facelift version (FL2020) comes with a new ECU and upgraded fan motor. The unit is externally identical to its predecessors, but replaces previous model numbers 201994050000 and 201963050000. The compact design and separate mounting of the water and fuel metering pump make it ideal for installations with limited space.

Areas of application

• Passenger car, van, bus and special vehicle

• Motorhomes and vehicles requiring engine and passenger compartment preheating

• Vehicles requiring CAN or LIN integration

Technical specifications

Generally

• Voltage: 12V

• Medium: Water

• Fuel: Petrol

• Interface: CAN, LIN

Power and consumption

• Electrical power (start): 135 W

• Electrical power (light load): 7 W

• Electrical power (large load): 24 W

• Heating power (small): 1,800 W

• Heating power (large): 4,300 W

• Fuel consumption (low): 0.23 l/h

• Fuel consumption (large): 0.57 l/h

Operational data

• Protection class: IP5K6K / IP5K9K (DIN EN 55025)

• Permissible ambient temperature (operation): −40 °C to +60 °C

• Max operating altitude: 1,500 m above sea level

• Upper voltage limit: 16 V

• Lower voltage limit: 10.5 V

• Permissible operating pressure: 2.5 bar

• Minimum water flow: 300 l/h

Documentation and accessories

• Exploded views

• Parts and accessories

• Mounting kit and operation

• Full technical documentation

This heater is a robust and reliable choice for professional installations where reliable preheating and high performance are essential.