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.
Contributes to meeting The Guiding Principles for High Performance and Sustainable Buildings
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