EVRHEAT Series 20

HOTSTART EVR20 Coolant Engine Heater

The EVRHEAT Series 20 has been designed and built with efficiency, versatility, and reliability in mind. Indicator lights on the operator display show current heater operation and temperature status, so you can be sure your engine is always ready to start. At-a-glance, users can see power is on, the element is energized, and the pump is circulating heated coolant. The integrated controls and sensors monitor the status of the heater and coolant; if an air pocket or other fault is detected, the heater deactivates power allowing for users to safely resolve the fault and reset the heater.

HOTSTART EVR20 Coolant Engine Heater Swivel Inlet

Installation of the EVR20 is simplified with an adjustable 180° swivel inlet hose barb, accommodating plumbing requirements in confined areas and allowing for easier field retrofits. The EVR20 applies heating power precisely, adjusting the output wattage in response to fluid temperature changes as little as 1 °F. This results in more uniform heat to the engine and eliminates nuisance low temperature alarms. When compared to thermosiphon alternatives, the EVR20 is more efficient in its operation, providing up to 45% energy savings over standard thermosiphon heaters.


Not intended for hazardous locations.

Heating Information

Primary Heating

  • Water
  • Engine Coolant / Water

Primary Heat Power

  • 1.65 kW
  • 2.5 kW

Power Specifications

Power Sources

  • AC, Single-Phase, 60 Hz


  • 120
  • 208
  • 240

Power Connectors

  • NEMA Plug
  • Unterminated cord

Temperature Control

Primary Temperature Control Set Points

  • 110°F (43°C)

Control Board Temperature

Primary High Limit Temperature

  • 195°F (90°C)

Mount Types

  • Bracket

Inlets / Outlets


  • 0.625” hose barb (15.9 mm)
  • 0.75" hose barb (19 mm)


  • 0.625” hose barb (15.9 mm)
  • 0.75" hose barb (19 mm)

Ingress Options

System Ingress

  • IP42


  • FCC/Industry Canada Compliant

Part Numbers

Voltage Wattage Part Number
120 1.65 kW EVR20F-11411-N00
Voltage Wattage Part Number
208 2.5 kW EVR20F-81211-A00
Voltage Wattage Part Number
240 2.5 kW EVR20F-21011-N00

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