Hydronic D4 – 13,700 BTU/hr
Espar’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 ![]() |
Hydronic D5 – 17,000 BTU/hr
Espar’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 ![]() |
Hydronic MII - 32,400 BTU/hr
Espar’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 ![]() |
Hydronic D16 – 54,630 BTU/hr
Espar’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 ![]() |
Hydronic 24/30/35 – 82,000 – 120,000 BTU/hr
Espar’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 ![]() |