Hydronic L3 - 24V

The Hydronic L3 24V is Espar's current-generation large-format coolant heater, engineered for demanding applications in off-highway equipment, motor coaches, marine vessels, and heavy-duty fleet vehicles. Available in 16 kW, 24 kW, 30 kW, and 35 kW output configurations, the L3 delivers reliable, fuel-efficient cabin and engine heating in environments where performance and durability are non-negotiable. A 12V variant is also available in the 30 kW boxed construction model.

Available Configurations:

• Compact Version — Ships pre-assembled with the coolant pump and fuel filter already mounted on the heater body, reducing installation time and simplifying serviceability.
• Standard Version — Heater unit only; coolant pump, wire harness, fuel filter, and other installation components are purchased separately, allowing full customization for your specific application.

Key Specifications:

• Output: 16 kW / 24 kW / 30 kW / 35 kW
• Voltage: 24V (12V available on 30 kW boxed construction model)
• Suitable for: off-highway equipment, motor coaches, marine, RV, and fleet applications

Not sure which configuration is right for your application? We are the heater guys — call us at 800.837.3900 for expert guidance.