Coolant Heaters

Hydronic D4 – 13,700 BTU/hr

Hydronic D4Espar’s Hydronic 4 Coolant Heater offers affordable heating solutions for off-road equipment, small trucks, automobiles and boats. Its compact size enables a simple installation and eliminates the need for electrical plug-ins. Diesel (D) and Gasoline (B) versions are available. Features and Benefits include:

  • Automatic heat regulation through 3 heat levels
  • Low fuel and power consumption
  • No electrical plug-ins
  • Easy start up of equipment
  • Self Diagnostics
Further Stats 
Hydronic D4 Brochure pdf-icon-transparent

Hydronic D5 – 17,000 BTU/hr

Hydronic D5Espar’s Hydronic D5/B5 Coolant Heater offers affordable heating solutions for trucks, off-road equipment, boats and buses. Its compact size enables a simple installation and eliminates the need for electrical plug-ins. Gasoline and Diesel versions are available Features and Benefits include:

  • Automatic heat regulation through 2 heat levels
  • Low fuel and power consumption
  • No electrical plug-ins
  • Easy start up of equipment
  • Self Diagnostics
  • Available in 12 and 24 volt versions
Further Stats 
Hydronic D5 Brochure pdf-icon-transparent

Hydronic MII - 32,400 BTU/hr

Hydronic MIIEspar’s Hydronic Coolant Heater is a powerful, compact and light weight heating system. It is typically used to provide engine, fuel & hydraulic pre-heat for off-road equipment. It is also suitable for providing both engine and supplemental cabin heat for buses Features and Benefits include:

  • Low power & fuel consumption through 4 heat levels
  • Comfort & safety for both driver and passenger
  • Windshield defrosting capabilities
  • Quick pre-heat without electrical plug-ins
  • An alternative to costly idling
  • Self Diagnostics
Further Stats 
Hydronic MII Brochure pdf-icon-transparent

Hydronic D16 – 54,630 BTU/hr

Hydronic D16Espar’s Hydronic 16 Coolant Heater is typically used for the Large Coaches, Boats and Off-Road Engines. These heaters provide engine, fuel and hydraulic preheat and can be incorporated into a coaches heating system to provide supplemental heat. The first choice for those who require rapid heating when operating in “Arctic-like” climates. These heaters are available only in the 24v version only.

Features and Benefits include:

  • No electrical plug-ins
  • Easy start up of equipment
  • Self-Diagnostics
  • Supplemental cabin heat
Further Stats 
Hydronic D16 Brochure pdf-icon-transparent

Hydronic 24/30/35 – 82,000 – 120,000 BTU/hr

Hydronic D16-2Espar’s Hydronic 24 / 30 / 35 model Coolant Heater are typically used for the Large Coaches, Boats and Off-Road Engines. These heaters provide engine, fuel and hydraulic preheat and can be incorporated into a coach’s heating system to provide supplemental heat. The first choice for those who require rapid heating when operating in “Arctic-like” climates. These heaters are available only in the 24v version only. Features and Benefits include:

  • No electrical plug-ins
  • Easy start up of equipment
  • Self-Diagnostics
  • Supplemental cabin heat
Further Stats 
Hydronic 24/30/35 Brochure pdf-icon-transparent