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Espar Off-Highway Equipment Heaters can provide engine preheat, cab comfort and windshield defrost.
We offer two basic types for heavy equipment and agricultural vehicles: air heaters and water heaters. Both systems satisfy the highest demands on sturdiness and cost
effectiveness.
Cab Heat Application Guidelines:
AIRTRONIC D2 - provides both cab comfort and winshield defrost capability for one-person cabs
AIRTRONIC D4 - should be considered fo larger cabs
- engine preheat - improved startability, supplements engine heating for improved comfort and defrosting capability, reliable cold weather starting
- no electrical plug-ins
- cab preheat - provides supplement cabin heat independently from the engine, faster heat recuperation after stops.
Engine Preheat Application Guidelines:
The following sizing chart is based on 1-2 hour preheat duration.
| Recommended Heater |
Engine Size
(By Dry Weight) |
Engine Size
(Cubic Inch Displacement) |
| Hydronic 5 |
Less than 2,000 lbs. |
Less than 700 in cubed |
| Hydronic 10 |
2,000 - 5,000 lbs. |
700 - 1,500 in cubed |
| Hydronic 35 |
5000 - 15,000 lbs. |
1,500 - 3,000 in cubed |
Cab Comfort and Engine pre-heating for Transports
 Espar Heater Systems manufactures diesel-fired heating systems to provide cab and sleeper heat in trucks, eliminating the need to idle the engine for heat.
Espar also supplies independent coolant systems for quick engine pre-heating, these systems require no electrical plug-ins and are ideal for cold weather starting.
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