When a Houston, Texas Mechanical Contractor began having problems with capacity on twin 500 ton Trane RTAC units, EvaporCool was the chosen solution. Field Measurement and Verification was performed side by side. The average kW per ton was reduced from 1.32 per ton to 1.28 per ton. ROI under three years. At $800 per ton to replace a chiller for additional capacity, $200 per ton to increase existing performance is a no brainer.