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Evaporative cooling has made summers more bearable for thousands of years and with 21st century technology, evaporative cooling provides effective, economical, environmentally friendly, and healthy cooling.

Evaporative cooling comes in five flavors:
  • Direct evaporative cooling: outside air is blown through a water-saturated medium (usually cellulose) and cooled by evaporation. The cooled air is circulated by a blower.
  • Indirect evaporative cooling: a secondary (scavenger) air stream is cooled by water. The cooled secondary air stream goes through a heat exchanger, where it cools the primary air stream.
  • Indirect/direct evaporative cooling: the primary air stream is cooled first with indirect evaporative cooling and then cooled further with direct evaporative cooling.
  • Indirect/indirect evaporative cooling: the primary air stream is cooled first with indirect evaporative cooling and then cooled further with a second pass of indirect evaporative cooling.
  • Indirect evaporative cooling/DX back-up: the primary air stream is cooled first with indirect evaporative cooling and then, if necessary to meet the cooling load, cooled further with DX (refrigerant) air conditioning.

Learn more about evaporative cooling
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Tonnage saved using supplemental indirect evaporative cooling.

We can help
Contact us about design support for evaporative cooling projects, including calculating tonnage saved by using supplemental evaporative cooling.

 Westaire Engineering designs and manufactures indirect, indirect/direct, indirect/indirect, and direct evaporative cooling units. Westaire also builds indirect cooling modules to attach to existing air handlers. Evaporative cooling modules increase the efficiency of the existing air handler as well as increase its cooling capability.

The Desert CoolAire packaged unit combines indirect evaporative cooling with DX back-up to create an air conditioner that reduces air conditioning costs from 50% to 70% compared to existing air conditioners. In addition to huge energy savings, the unit substantially improves indoor air quality by introducing outside air in significantly higher quantities than code ventilation requires.

Desert Aire is beta-testing CoolAire packaged units at numerous sites in Oregon, Washington, Idaho, and California.