ASHRAE 143-2024 ✓ Most Recent

ANSI/ASHRAE Standard 143 provides laboratory test procedures and calculations for establishing the cooling capacities and power requirements for indirect evaporative air-cooling equipment.

This standard applies to testing indirect evaporative air coolers operating at steady-state conditions that

• Sensibly cool a primary airstream through heat exchanger(s) by the evaporation of water into a secondary airstream
• Are packaged systems or are components of packaged systems

The standard does not apply to

• Devices that use mechanical refrigeration or thermal storage to cool the primary airstream, the secondary airstream, or the water provided for evaporation during the test or
• Devices that dry the primary or secondary airstream during the test