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Blow Air  |  SKU: WHS3-3S-1791

S3-3S water heater

€920,61
pay up to 30 installments,

Delivery and Shipping

At Krolit, we are committed to providing a seamless and reliable shipping experience for our customers. Once you place your order, it is generally processed within 1-3 business days, excluding weekends and holidays. As soon as your order ships, you will receive a confirmation email with your tracking number and shipment details, so you can easily track your delivery.

We offer several shipping options, including standard, express, and overnight shipping, to meet your needs. Shipping costs and estimated delivery times are clearly displayed at checkout and vary based on your location and the shipping method selected. Please note that all delivery times are approximate and may be subject to delays due to factors such as weather conditions, high order volume, or courier issues.

Currently, Krolit [offers/does not offer] international shipping. If international shipping is available, please be aware that customs duties, taxes, or other additional fees may apply, which are the responsibility of the recipient. We recommend checking with your local customs office before placing an order.

To ensure timely delivery, please ensure the shipping address provided at checkout is correct and complete. Krolit is not responsible for delays or lost packages due to incorrect or incomplete address information. If your package appears to have been delivered but you haven't received it, we recommend contacting the courier first. If the problem persists, our customer support team is available to assist you.

If you have any questions or concerns regarding shipping or delivery, please do not hesitate to contact us at [your email address] or by phone at [your phone number].

At Krolit, we value your satisfaction and are committed to ensuring your order arrives safely and on time.

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Description

The S Series air heater features a sturdy casing made of galvanized and powder-coated steel, ensuring strength and durability. This device is equipped with a 3-speed fan, allowing you to adjust performance to the specific needs of the room.

Thanks to the advanced technology used in the air heater, the heat output can be precisely controlled, thus increasing the functionality of the device and improving its overall parameters. The extensive range of S Series heaters allows the heat output to be adjusted to fully meet the thermal comfort of people in medium and large cubic capacity spaces.

Main features:

  • Structure: Galvanized steel, powder coated
  • Fan: 3 speeds, adjustable
  • Heating power: Adjustable, for optimal comfort
  • Mounting: Dedicated mounting console, for a wide range of installation options and precise airflow direction

Places of use: The water heater is perfect for environments such as:

  • Warehouses
  • Warehouses
  • Production areas
  • Mechanical workshops
  • Logistics centers
  • Commercial pavilions

Technical parameters:

  • Power range: 2-66 kW
  • Weight: 16-29 kg
  • Frame: Galvanized steel, powder coated
  • Heat Exchangers: Available with 1, 2 or 3 row heat exchangers
  • Fan: IP 54 protection, compliant with European ErP 2015 standards

The heaters are equipped with dedicated accessories that allow for fully automated operation. This improves operational efficiency and allows for measurable savings thanks to intelligent device control and energy consumption regulation.

These features make the S Series air heater an excellent choice for ensuring optimal thermal comfort in various industrial and commercial environments.

Technical specifications

S1-3S S2-3S S3-3S S4-3S
Product code WHS1-3S-1789 WHS2-3S-1790 WHS3-3S-1791 WHS4-3S-1787
Nominal thermal power [kW*]
3 speeds/ 2 speeds/ 1 speed
14.7 / 13.1 / 11.3 23.4 / 16.0 / 14.0 36.9 / 20.8 / 17.8 50.1 / 38.5 / 27.5
Heating capacity range [kW**] 1.57 - 19.5 2.1 - 30.8 2.92 - 48.8 4.17 - 66.2
Maximum air flow [m³/h]
3 speeds/ 2 speeds/ 1 speed
1400 / 1150 / 900 2000 / 1100 / 900 1800 / 850 / 700 3350 / 2250 / 1400
Maximum isothermal flow rate [m] 10 13 11 18
Number of ranks [pcs] 1 2 3 2
Water capacity [dm3] 0.5 1.3 1.9 2
Maximum heating fluid temperature [°C] 120 120 120 120
Maximum heating fluid pressure [MPa] 1.6 1.6 1.6 1.6
Connector diameter [cal] 3/4 3/4 3/4 3/4
Voltage/Frequency [V/Hz] 230/50 230/50 230/50 230/50
Motor rated current [A]
3 speeds/ 2 speeds/ 1 speed
0.40 / 0.30 / 0.25 0.58 / 0.30 / 0.20 0.58 / 0.30 / 0.20 0.84 / 0.65 / 0.54
Rated engine speed [rpm]
3 speeds/ 2 speeds/ 1 speed
1350 / 1150 / 900 1400 / 1000 / 680 1400 / 1000 / 680 1400 / 1050 / 750
Motor nominal power [W]
3 speeds/ 2 speeds/ 1 speed
85 / 65 / 55 125 / 75 / 43 125 / 75 / 45 190 / 150 / 120
Motor IP protection rating 54 54 54 54
Net weight [kg] 15 21 23 27
Noise [dB***]
3 speeds/ 2 speeds/ 1 speed
51 / 45 / 43 54 / 48 / 46 53 / 47 / 45 56 / 50 / 48
  • - for parameters 90/70°C and inlet air temperature 0°C
    ** - maximum capacity for 120/90°C, 0°C inlet air temperature, 3rd stage // minimum capacity 40/30°C, 20°C inlet air temperature, 1st stage
    *** - measurement at 5 m distance from the device

Main Benefits of the S3-3S Blowair Water Heater

  1. Superior energy efficiency : Uses low-temperature hot water (45-70°C) from condensing boilers, heat pumps or solar thermal, reducing energy consumption by 20-30% compared to traditional systems.
  2. Fast and even heating : Distributes hot air evenly thanks to the optimised finned coil design and high-capacity fan, eliminating cold spots.
  3. Versatile installation : Available in wall, ceiling or column configurations, it is suitable for industrial, commercial or civil spaces (e.g. workshops, warehouses, sports centres).
  4. Low maintenance costs : Robust painted steel structure and copper/aluminium battery resistant to corrosion and wear, with long-lasting electrical components.
  5. Advanced Quietness : Blowair technology with balanced fan and brushless motor for ultra-quiet operation, ideal for noise-critical environments.
  6. Ecological compatibility : Can be integrated with renewable sources (e.g. geothermal heat pumps) to reduce the CO₂ footprint.
  7. Customized control : Management via digital thermostat or home automation systems, with fan speed adjustment and time programming.

Conclusion
The S3-3S Blowair fan heater is an optimal solution for efficient and flexible heating in settings requiring rapid thermal response and wide coverage. The combination of high efficiency, durability, and low noise makes it ideal for medium-sized production, logistics, or commercial environments. Thanks to Blowair technology, it guarantees superior comfort with reduced operating costs, positioning itself as a strategic investment for those seeking to optimize energy consumption without compromising performance.

Ideal for: mechanical workshops, distribution centers, gyms, showrooms, laboratories.
Product compliant with European safety and performance standards.

Frequently Asked Questions

FAQ - Blowair S3-3S Water Heater
The S3-3S model uses hot water from a boiler or heating system. This water passes through a heat exchanger, while the 3-speed fan blows air through it, distributing the heat throughout the room.
The Blowair S3-3S fan heater is ideal for medium and large industrial environments, warehouses, workshops, greenhouses and commercial spaces with significant ceiling heights.
Yes, the built-in fan supports 3 selectable speeds. It can be controlled manually or integrated with a room thermostat for automatic control.
No, Blowair designed the S3-3S to combine high performance and low noise levels, maintaining good acoustic comfort even in production spaces.
Compatible accessories include:
• Wall or ceiling mounting brackets
• Room thermostats
• 3-stage regulators
• Mixing valves
• Optional ducts for external air
Yes, it is recommended to:
• Clean the heat exchanger periodically
• Check the integrity of the fan blades
• Check the electrical connections and the status of the controls
Minimal but regular maintenance ensures efficiency and durability.

Product safety

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