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Helpman THOR-A

Helpman THOR-A industrial air coolers have been designed for airsock application. All models are fitted with an airsock ring and fan motors capable of supplying the additional external pressure that is required for the proper functioning of an airsock system. Suitable for applications like processing rooms, working production areas and greenhouse cooling.

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Standard configuration

      • Coil
        - 4 coil block modules
        - 4 or 6 tube rows deep
        - Cu ripple fin tubing ø 5/8” (smooth tubing for brine)
        - Tube pitch 50 x 50 mm square
        - Corrugated Alu-fins
        - Fin spacings 4, 6 and 7 mm
      • 1-3 Fans, available in a range of different executions. Airsock diameters Ø 450 up to Ø 730 mm. Enclosed design spray-tight fan motors, protection class IP55. Motors are equipped with a thermal safety device in the windings, connected to separate terminals in the box. High and low fan speed execution.

        -1500 rpm (H design)
        -1000 rpm (L design)

      • Corrosion resistant casing material aluminium/sendzimir, white epoxy coated (RAL 9003). Hinged, enclosed end covers. Hinged driptray, drain(s) 32 mm. PVC connection freely adjustable into either horizontal or vertical position.
      • Refrigerant distribution optimised to refrigerant applied.
      • Refrigerant connections on right hand side (fan side view).
      • Fitted with schräder valve on the suction connection for testing purposes.
      • Sufficient room for fitting the expansion valve inside casing.
      • Suitable for dry expansion or pumped system.
      • Delivery in mounting position. Coolers are mounted on wooden beams. Installation can take place with use of a forklift.


For a full overview of all available options and additional technical specifications please refer to the product leaflet.

  • Evaporating temperatures +5 to -15 °C
  • Refrigerants: all H(C)FC, brine, CO2
  • Capacities (SC2): 4 up to 46 kW
  • Airsock diameter: 450 up to 730 mm

This product is only available on the Asian market.

Spare parts available worldwide.

AlfaSelect Air

These air heat exchanger products can be configured and selected using the AlfaSelect Air selection tool.
> AlfaSelect Air 

Cold Room Calculator

Mobile app for iOS & Android to calculate the expected heat load for your cold room.
Cold Room Calculator

How it works

Alfa Laval finned coil air heat exchangers have been designed to achieve an optimized exchange of thermal energy between air and a refrigerant or fluid. The ‘heart’ of our air heat exchangers is the finned coil, built up from a circuit of interconnected tube serpentines and fins to increase the heat exchanging surface. Thanks to the combination of key design variables (coil materials, coil geometry, casing design, fan type), air units are very versatile heat exchangers with a great variety of applications in many industries. Alfa Laval supplies finned coil air heat exchanger products for a wide variety of applications.

Air coolers & air-cooled condensers

Air coolers and air-cooled condensers are key components in air cooling and airconditioning systems. On the refrigerant side the most common media are a brine or an evaporating refrigerant like H(C)FC, ammonia or CO2. A chilled brine may be supplied from a chiller that is potentially located far away, but a liquified refrigerant must come from a nearby condensing unit. When an evaporating refrigerant is used, the cooling coil is the evaporator in the vapour-compression refrigeration cycle (‘direct expansion’ or ‘DX’ system).

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