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Core Features & Benefits
Engineered for best overall performance by a world-class German manufacturer.
Compact dimensions allow for more versatile installation locations, internally and externally.
With EasyStart Pro, the D4E operates reliably up to 3,000m (9,900ft).
Upgraded internals provide a quieter experience and an increased life cycle of 5,000 hours.
Espar Hydronic S3 D4E Water Heater Kit
The newest generation Eberspacher Hydronic D4E was designed for efficiency and durability on the road. Bundled with the EasyStart Pro or Heatso digital controller, this kit will keep your cabin warm in any weather.
Key Features of the Espar Hydronic D4E RV 12V Heater
An upgraded brushless fan for quieter performance and extended lifespan.
Stepless heating control and integrated temperature sensor for automatic mode.
Dynamic fan speed is adjusted according to the temperature set.
Optimized noise reduction and NVH for improved comfort.
The Revolutionary Espar Hydronic S3 D4E
This diesel water heater uses cutting-edge technologies to provide a 14,665 BTU output while staying fuel efficient. The D4E is capable of reaching a record altitude of 3,000 meters (9,900 feet) when combined with the EasyStart Pro controller.
This heater operates significantly quieter thanks to the brushless fan and upgraded pump. As a result of the internal upgrades, the lifecycle is also increased to 5,000 hours.
Central Heating in Your Van or RV
Once activated, the Espar D4E heater will use the vehicle’s own fuel in a combustion process to heat the coolant via a heat exchanger inside the Hydronic Unit.
One way to save both power and fuel is using residual heating with a switched-off engine. This feature allows the system to run for as long as the coolant temperature does not drop below the threshold set by the user.
The Espar air and water heater is self-regulating and operates in a similar way to a domestic central heating system.
Complete Water System Custom-Built for You
The shipped kit provides a complete domestic water heating system that can be used for showers and taps. In addition, the universal kit can be used to preheat the engine, as well as heat air and floors.
If you require extra features, custom kits can be built on demand.
Technical Specifications
Fuel: Diesel
Voltage: 12V
Max. Heat Output: 14,700 BTU (4.3 kW)
Max. Altitude: 9,900 ft (3,000 m)
Service Life: 5,000 hours
Fuel Consumption: 0.57 l/h (0.15 gal/h)
Energy Consumption: 24W
Dimensions (L x W x H): 215 x 91 x 144mm (8.4 x 3.5 x 5.6in)
Weight: 2kg (4.4lbs)
Heat Exchanger - Power Consumption: 70 W
Heat Exchanger - Weight: 2.2 kg
Heat Exchanger - Dimensions (LxWxH): 255 x 125.5 x 114 mm
Water Expansion Tank - Weight: 0.9 kg
Water Expansion Tank - Dimensions (LxWxH): 100 x 220 x 300 mm
