Independent case study
Simon Property Group Great Mall, Milpitas CA.
Detailed baseline and post measurements were taken on seven (7) nominal 35-ton Carrier rooftop units serving disperse areas of the property — verifying the financial savings, increased efficiency, and carbon footprint reductions delivered by ACFlush.
Energy reduction
21.3%
Avg kW after regression
More cooling
22.2%
Tons of cooling delivered
Payback
7.8 mo
Across 7 commercial RTUs
5-year ROI
667%
Project savings vs cost
Demo particulars
- Location
- Milpitas, CA
- Dates
- 13 May – 17 June
- Equipment
- 7 × Carrier WeatherMaker 50A3-035LPH
- Capacity
- 35-ton nominal each
Methodology
- Protocol
- IPMVP
- Power monitoring
- Continuous on 4 RTUs
- Energy rate
- $0.27 / kWh
- Annual runtime
- 2,555 hours (conservative)
Project economics
- Project cost
- $19,600 ($2,800 × 7)
- Annual savings
- $30,054
- Simple IRR
- 153%
- Payback
- 7.83 months
Full results — RTU summary
All values calculated after regression analysis.
| Metric | Baseline | Post-ACFlush | Change |
|---|---|---|---|
| Avg kW (after regression) | 29.20 | 22.98 | −21.3% |
| Total kWh | 522,308 | 410,998 | −111,310 |
| Total cost to operate | $141,023 | $110,969 | −$30,054 |
| Total capacity (tons) | 106.55 | 130.25 | +22.2% |
| Avg kW / ton | 1.56 | 1.23 | −21.1% |
| Avg coefficient of performance | 2.29 | 2.89 | +26.2% |
| Avg EER | 7.81 | 9.87 | +26.3% |
| Avg SEER | 8.43 | 11.18 | +32.6% |
"Following treatment with the ECM, the 7 RTUs showed an average reduction of 21.3% in energy use while at the same time producing 22.2% more tons of cooling."
Tri-S Technologies · Independent verification report