Internal Revenue Serivce (IRS) NY
Verified Annual Savings: $2.1MM and 63,680 MMBTU
Project Highlights
2022 AEE Project Award Winner
Reduce annual electricity usage by 9.3 million kWh
Reduce annual natural gas usage by 31,500 MMBtu
Reduce annual water usage by 3,726 kGal
Reduce overall energy consumption by 57%
Total utility incentives and rebates in excess of $2.6MM
Energy Conservation Measures
Replacement of constant volume reheat coils with VAV boxes
Front-end BAS installation and controls integration/expansion
Installation of VFDs on AHU units
Steam boiler decommissioning/hot water condensing boiler installation
LED retrofits with advanced lighting controls
Cooling tower replacement
UPS upgrade
Project Overview: In 2022, CEG completed a $45.7 MM project at a 542k SF IRS office building in the state of New York. The building was built in the 1970s, houses about 3,000 employees per day, and consists of open office spaces with call centers, administrative offices, training rooms, loading docks, print room, mailroom, health unit, cafeteria, sewage treatment plant, and total energy plant. CEG’s deep energy retrofit addressed deferred maintenance, replaced decaying cooling tower and electrical infrastructure, and modernized end-of-life/failed equipment. The scope included major mechanical and HVAC equipment upgrades, lighting upgrades, and building control and occupant comfort improvements. Implementation of all the measures is generating over $2.1 million in annual energy cost savings.
Deep Energy Retrofit:
During implementation, CEG prioritized replacement of failed cooling towers, which allowed IRS to eliminate a $30k/month expense for temporary towers. CEG also replaced fifty-year-old steam boilers and ancillary systems with modular, hot water condensing boilers. As part of the comprehensive air-side upgrades, CEG replaced AHU motors, installed VFDs, and replaced all 24/7 constant volume reheat boxes with new variable air volume boxes. CEG also replaced the existing proprietary BAS, which had limited control capability, with an open-source BAS platform. CEG upgraded controls hardware and software to improve efficiency and occupant comfort, address performance and connectivity issues, and automate previously manual HVAC operations. As part of thorough interior and facade lighting upgrades CEG replaced antiquated, energy intensive fixtures with LEDs and used advanced lighting controls to account for variable occupancy throughout the open office spaces. CEG expanded the core project to include asbestos abatement and address deferred maintenance items that had not been included in the original project scope (e.g., replacement of failed AHU dampers, actuators, and fan pulleys) at no cost to IRS by obtaining $2.6MM in utility incentives. CEG also replaced the central rotary uninterruptible power supply (UPS), which provides emergency power to security and IT loads, with point-of-use UPSs in the data center and 44 server closets.
