scope:

This standard covers testing under steady-state conditions for rating of indirect evaporative coolers that

a. sensibly cool a primary airstream through heat exchanger(s) by the evaporation of water into a secondary airstream and

b. are self-contained or are components of packaged systems.

This standard does not cover

a. devices that use mechanical refrigeration or thermal storage to cool the primary airstream, the secondary airstream, or the water provided for evaporation or

b. devices that dry the primary or secondary airstream.

PURPOSE

This standard provides test procedures and calculations for establishing the cooling capacities and power requirements for indirect evaporative cooling equipment.