The development of Excool began in response to the broadening of  the recommended operational environmental envelope by the ASHRAE TC9.9 committee in 2008.

Excool is a fully developed and purpose designed data centre cooling product which we believe is the most efficient indirect economiser in the world in both terms of water and energy usage. In many cases it is possible to use the product without the need for mechanical cooling (compressor free cooling).

The system uses outdoor air indirectly through a specially designed series of heat exchangers enabling cooling to take place without outdoor air entering the data hall, therefore air pollution hazards such as smoke and salt aerosols are kept out of the building. With the use of specially designed adiabatic sprays the Excool product can maintain data centre internal temperatures of 24 °C with ambients in excess of 35 °C.