Espar S3-D5E Hydronic Heater - 12V

The Espar/Eberspaecher S3-D5E is a 5 kW diesel-fired engine coolant heater designed for reliable cold-weather starting and interior heating in demanding commercial and adventure applications.

Engineered for diesel engines up to 15L, the S3-D5E circulates heated coolant through the engine block and heater core — eliminating cold starts, reducing engine wear, and delivering cabin warmth before you turn the key. In van and overland builds, it pairs with Kalori heat exchangers to provide efficient interior heating without idling.

Key Specifications

• Fuel: Diesel
• Voltage: 12V DC
• Output: 5 kW
• Engine compatibility: Diesel engines up to 15L displacement
• Controller: Requires Easy Start Pro controller and wiring harness (sold separately)

Applications

• Commercial trucks and fleet vehicles
• Adventure vans and overland builds (via Kalori heat exchanger)
• Heavy equipment and off-road vehicles

OEM Espar/Eberspaecher quality. Engineered for North American climate conditions.