Unit Heater S-3S series 230V – model S2-3S / WHS2-3S-1789 is a compact industrial water fan heater designed for heating manufacturing halls, warehouses, logistics centers, workshops, and commercial pavilions.
The unit features a galvanized steel housing with powder coating, ensuring corrosion resistance and mechanical strength.
It includes a 1-row heat exchanger and a three-speed fan (IP54) that meets the ErP 2015 Directive for energy efficiency.
Three fan speeds allow precise airflow adjustment, and optional control accessories enable full automation for optimal comfort and energy savings.
Advantages
- Robust galvanized steel housing, powder-coated
- Compact design and easy wall or ceiling installation
- Energy-efficient 3-speed fan, IP54 protection
- Low noise level and reliable continuous operation
- Compatible with automatic HC control systems
- Suitable for water temperatures up to 120 °C
- 24-month warranty
Applications
Ideal for heating:
- Industrial and production halls
- Warehouses and storage areas
- Car repair workshops and garages
- Logistics centers and commercial buildings
- Sports and public facilities
Technical Specifications
| Parameter | Unit Heater S2-3S / WHS2-3S-1790 |
|---|---|
| Product code | WHS2-3S-1790 |
| Nominal heating capacity [kW]* | 23.4 / 16.0 / 14.0 |
| Heating capacity range [kW] | 2.1 – 30.8 |
| Maximum airflow [m³/h] | 2000 / 1100 / 900 |
| Maximum isothermal range [m] | 13 |
| Number of heat-exchanger rows | 2 |
| Water capacity [dm³] | 1.3 |
| 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] | 0.58 / 0.34 / 0.30 |
| Motor speed [rpm] | 1400 / 1100 / 850 |
| Motor power [W] | 124 / 85 / 75 |
| Motor protection class | IP54 |
| Net weight [kg] | 19 |
| Noise level [dB] | 54 / 48 / 46 |
* Parameters based on 90/70 °C water and 0 °C inlet air.
Conclusion
S2-3S / WHS2-3S-1790 offers a perfect balance between power, efficiency, and reliability.
With a two-row heat exchanger, solid metal construction, and low noise, it ensures effective and economical heating for medium-sized industrial and commercial facilities.















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