Unit Heater S-3S series 230V – model S4-3S / WHS4-3S-1787 is a high-capacity industrial water fan heater engineered for large-scale facilities such as production halls, warehouses, logistics centers, car workshops and sports arenas.
It features a 2-row heat exchanger that delivers excellent thermal efficiency and a three-speed fan (IP54) fully compliant with the ErP 2015 Directive.
The durable galvanized steel housing with powder coating ensures long-term resistance to corrosion and mechanical damage.
Advantages
- High heating capacity – up to 50 kW
- Galvanized steel housing with powder coating
- 2-row heat exchanger for strong heat output
- 3-speed fan (IP54) with low noise operation
- Compatible with automatic HC control systems
- Reliable performance in industrial conditions
- Designed for water temperatures up to 120 °C
- 24-month warranty
Applications
Ideal for heating:
- Industrial and production halls
- Logistics centers and warehouses
- Car workshops and garages
- Sports and public buildings
- Large commercial spaces
Technical Specifications
| Parameter | Unit Heater S4-3S / WHS4-3S-1787 |
|---|---|
| Product code | WHS4-3S-1787 |
| Nominal heating capacity [kW]* | 50.1 / 38.5 / 27.5 |
| Heating capacity range [kW] | 4.17 – 66.2 |
| Maximum airflow [m³/h] | 3350 / 2250 / 1400 |
| Maximum isothermal range [m] | 18 |
| Number of heat-exchanger rows | 2 |
| Water capacity [dm³] | 2.0 |
| Max fluid temperature [°C] | 120 |
| Max fluid pressure [MPa] | 1.6 |
| Connection diameter [inch] | 3/4 |
| Power supply [V/Hz] | 230 / 50 |
| Nominal motor current [A] | 0.82 / 0.62 / 0.41 |
| Motor speed [rpm] | 1380 / 1030 / 650 |
| Motor power [W] | 185 / 140 / 90 |
| Motor protection class | IP54 |
| Net weight [kg] | 25 |
| Noise level [dB] | 56 / 50 / 48 |
* Parameters based on 90/70 °C water and 0 °C inlet air.
Conclusion
S4-3S / WHS4-3S-1787 is the most powerful unit in the S-3S series, delivering exceptional heating performance for large industrial and logistics spaces.
Its robust metal construction, efficient heat transfer and quiet operation make it a professional-grade solution for demanding environments.















ONLINE PAYMENT PAYPAL
Reviews
There are no reviews yet.