The model S4-3S / WHS4-3S-1789 is a compact and efficient heater, designed for heating industrial halls, warehouses, workshops, logistics centers, and professional spaces.

The device features a galvanized steel casing with electrostatic coating, ensuring corrosion resistance and high mechanical stability. It incorporates a single row heat exchanger and a three-speed fan (IP54), compliant with the ErP 2015 Directive for energy efficiency.

• Durable galvanized steel casing
• Compact design, easy installation on wall or ceiling
• Energy-efficient three-speed fan
• Low noise levels and reliable continuous operation
• Suitable for water temperatures up to 120°C

Technical Specifications:

• Product code: WHS4-3S-1787
• Nominal heating power [kW]: 50.1 / 38.5 / 27.5
• Heating power range [kW]: 4.17 – 66.2
• Maximum air flow [m³/h]: 3350 / 2250 / 1400
• Maximum isothermal range [m]: 18
• Number of heat exchanger rows: 2
• Water capacity [dm³]: 2.0
• Maximum fluid temperature [°C]: 120
• Maximum fluid pressure [MPa]: 1.6
• Connection diameter [inches]: 3/4
• Operating voltage [V/Hz]: 230 / 50
• Rated 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

The model S4-3S / WHS4-3S-1789 offers reliable and economical heating for small industrial or commercial areas. Its durable construction and silent operation make it an ideal choice for professional heating applications.