energy efficient alternative to air conditioning

External WetBox – Small

90% more energy efficient than traditional refrigerant air conditioning

External WetBox – Small

The WetBox evaporative cooler contains inbuilt evaporative cooling pads.

SMARTech Heating & Cooling Small External SmallThe external WetBox evaporative cooler should be used as part of a mechanical ventilation system or an air handling solution with a paired supply and extract fan.

External WetBoxes are designed to be externally mounted and the standard configuration is down flow, where air is supplied from the base of the cooler into the area that requires cooling.


An input is available to enable and disable cooling in the evaporative cooler. An output is offered to communicate the state of the cooler.

Modes of operation

Cooling Mode

In cooling mode, the water circulation system is in operation and the cooling pads are wetted. Air is pulled over the pads by an external supply fan into the building. The evaporation of water from the pads results in a reduction in air temperature.

Configuration Options

External WetBox – Small

Alternative Options

This WetBox is also available in a larger size (up to 18,000m3/hr). Please see the EcoCooling WetBox Large product page for more details. Alternatively, if you are looking at an installation where there is no outside plant space, call our specialist team for advice about plant rooms.

The External WetBox Small is designed and manufactured by EcoCooling –

Evaporative cooling provides heating solutions for energy conscious organisations

Costs less than 15p per hour


  • Energy Savings of up to 90% compared to air conditioning
  • Up to 60Kw of cooling from just 2.4Kw of electricity
  • Reduced Carbon footprint
  • Heating and cooling system available
  • Provides more comfortable working environment

Where to use

Case Studies

We’ve built a strong reputation through the delivery of excellent service and results

EcoCooling Authorised Installer logo
Evaporative Cooling External WetBox – Small
Evaporative Cooling External WetBox fitted on roof of warehouse
Evaporative Cooling External WetBox fitted on warehouse
Evaporative Cooling External WetBox Small fitted onto building

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