The Nuts & Bolts: Our Process
Carbon Lighthouse engineers collected and analyzed over 200,000 voltage, current, power factor, light, temperature, humidity, and CO2 data points. 440 Clyde is a pneumatically controlled building without a central building management system. The thermostats and VAV boxes have no method of communicating their status to any outside or central equipment.
During a 2007 retrofit, an HVAC efficiency project and a lighting efficiency project were completed. Carbon Lighthouse’s challenge was to find enough additional savings to make the building 100% carbon free. Our engineers discovered two malfunctioning economizers, excessive simultaneous heating and cooling in the VAV system, scheduling opportunities, and an opportunity to lock discharge dampers open on two of the return air fans and install Variable Frequency Drives.
The project resulted in 662,278 lbs of annual C02 savings and $5.05/sq ft of savings.