1.5 Star
NABERS Rating Improvement
3 year
Pay-back period
Project Highlights
- Reduced building energy consumption and operational costs significantly.
- Installed advanced BMS and integrated HVAC control with predictive maintenance.
- Upgraded to energy-efficient LED lighting with smart sensor controls.
- Replaced aging chillers with high-efficiency Turbocor units.
- Improved tenant comfort and satisfaction, boosting lease renewals.
Citadel Tower’s Tech Stack
Oztech Controllers
For decades Oztech manufactured our own controllers. They were known for their great reliability, and novel solutions to issues which the big manufacturers had ignored.
- •Highly reliable.
- •Cost effective option.
- •Enables intelligent automation.
Ozmon
OzMon is Oztech’s in-house head-end software. It has been used on dozens of sites around the country, and reliably controlling buildings for years.
- •Highly reliable
- •Fully supported system.
Project Snapshot
| Project Element | Details |
|---|---|
| Client | Tackelly/JLL |
| Project Address | 799 Pacific Highway, Chatswood NSW |
| Services Provided | Staged BMS upgradde to BACnet based system, replacement of lighting with LEDs, integration of HVAC systems with VAV controls and predictive maintenance algorithm, installation of chillers, and continuous minitoring and strategy refinements. |
Building Background
Located at 799 Pacific Highway in Sydney’s Citadel Towers, this twin-tower commercial complex required a strategic upgrade to its Building Management System (BMS). The facility operates as a premium office space managed by Tackelly/JLL. The existing infrastructure was dated and inefficient, struggling to meet sustainability targets and rising tenant expectations. With escalating energy costs and an initial NABERS rating of 3.5 Stars, the client sought Oztech’s expertise to modernize building systems and align with high-performance energy standards.
Scope of Project
Oztech Intelligent Systems was engaged to deliver a comprehensive energy and systems upgrade over a five-year period. The project included:
- Staged BMS upgrade to a BACnet-based system for HVAC, lighting, and metering control.
- Full replacement of legacy lighting with LED technology and smart daylight/occupancy sensors.
- Integration of HVAC systems with new VAV controls (pressure independent) and predictive maintenance algorithms.
- Installation of Turbocor chillers in both chilled water plantrooms to replace low load systems.
- Continuous data monitoring and strategy refinements for performance optimization.
The Oztech Difference
Deep retrofit experience
Oztech’s institutional knowledge enables us to deliver successful retrofits without downtime.
Putting clients first
The tenant comes first, and our job is to ensure seamless project completion without disruption to your tenants.
Close collaboration
By fostering close collaboration with the facilities team, Oztech ensures that our clients have a soft landing when the project is complete.
Unique innovations delivered:
- Self-learning optimum start/stop logic, extended for temperature forecasting via Niagara
- Dynamic temperature and pressure reset for chilled and condenser water systems, plus optimized AHU fan control based on VAV feedback
- Enhanced economiser logic leveraging outside vs return air enthalpy
- Advanced VAV control using self-tuning PID loops and improved proportional/deadband settings
- After-hours zoning for AHUs, controlling only necessary VAV zones and reducing unnecessary operation
Looking Ahead
Oztech continues to support 799 Pacific Highway through ongoing BMS maintenance, seasonal tuning, and NABERS rating strategy alignment. Future initiatives include integrating sub-metering dashboards for tenant transparency, coordinating with upcoming tenant fitouts, and refining HVAC algorithms based on seasonal performance data. Our dedicated technician schedule ensures the building remains at peak efficiency and well-prepared for any operational changes.
