Simple payback in 3 years
Challenge
Connected comfort issues
- When a high-rise exceeds 15 stories, controlling the building pressure is much more challenging and complex
- The main tower is a 33-story high-rise and is directly connected to a 5-story performing arts complex; because of the dissimilar building heights, large amounts of air flowed between the two buildings and caused major comfort issues
- Building pressure algorithms had to coexist with CO2 demand ventilation control strategies
- Night-time/weekend set-back strategies needed to be integrated
- The stack effect pressures on elevator and smoke control shafts were uncontrolled
Approach
Top to bottom improvements
- Pathian® provided project management, engineering, and commissioning services
- Installed building pressure sensors in the lobby, and two additional sensors at intermediate elevations
- Replaced system controllers on 12 large custom AHU’s
- Reprogrammed AHU’s for Syrx control
- Installed automated control dampers on air handler discharge air plenum
- Added minimum OSA flow stations to air handlers
- Integrated zone humidity control with air handler operation
- Implemented Pathian Analytics software to track, evaluate and sustain optimal equipment performance
Results
Savings that feel good
- Increased comfort level across both buildings and all 33 stories
- Total project cost: $326,000
- Project actual savings:
- $77,939 in electric (12 months of normalize electrical invoices)
- $27,416 in natural gas (12 months of normalize gas invoices)
- Simple Payback: 3.09 years
- Certified Energy Star Rating: 2017, 2018, 2019, 2020
Other industries
Industry
Government
Location
Columbus, Ohio
Building Facts
Office building and
theater complex
Opened in 1989
980,097 sf
33 stories
2100+ employees