Series Comparison
EHA vs EHA/S: What’s the Difference?
A side-by-side comparison for distributors, service companies and technical buyers.
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Quick Answer
EHA uses electronic temperature control with microprocessor control and power/operating indication. EHA/S uses a bimetal thermostat and is the simplified economical version. Both series are classified as self-circulating engine coolant preheaters.
EHA
Standard route with electronic temperature control.
EHA/S
Simplified economical route with a bimetal thermostat.
Side-by-Side Comparison
| Field | EHA | EHA/S |
|---|---|---|
| Positioning | Standard version | Simplified economical version |
| Control method | Electronic temperature control with microprocessor control | Bimetal thermostat |
| Indication | Power and operating indication | No additional indication claim used here |
| Circulation class | Self-circulating | Self-circulating |
| Listed models | 9 | 7 |
| Voltage options | 240 VAC, 120 VAC, 50 VDC | 240 VAC, 120 VAC |
| Power range | 500-2000 W | 500-2000 W |
| Applicable displacement | 2.5-11.5 L | 2.5-11.5 L |
| Listed weight | 1.2 kg | 1.2 kg |
Which One Should You Continue With?
Review EHA when
Your requirement calls for the electronic-control configuration or the listed 50 VDC option.
Review EHA/S when
Your requirement fits the simplified economical version and a listed 120 VAC or 240 VAC option.
This comparison identifies the product path; it is not a final model selection. Send the engine, voltage and installation inputs for confirmation.
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