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Cooler, Indirect Evaporative

Last Updated: 09/18/17

Multi-staged indirect evaporative coolers (IEC) use a unique air-processing technology that delivers space conditioning using only a fraction of the energy consumed by mechanical air conditioners

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Life Cycle Cost Savings
GSA's Green Proving Ground found that indirect evaporative coolers can achieve an 80% energy savings. Payback is less than 15 years on average, for data centers. These units are 57 - 92% more efficient than code-compliant roof-top units.
Guiding Principles
Contributes to meeting The Guiding Principles for High Performance and Sustainable Buildings
Additional Guidance
These units are particularly appropriate for dry climate zones (data centers in ASHRAE climate zones 2B - 6B) found in the Western United States. The Green Proving Ground recommends deploying indirect evaporative coolers as follows:

Data centers (retrofit and new construction) -- ASHRAE climate zones 2B - 6B
Outside air pre-conditioner (retrofit): ASHRAE climate zones 2B, 3B
Zone cooler (retrofit and new construction): AHSRAE climate zoones 4B - 6B