CASE STUDY — Australian Government Site · Sydney, NSW
Independent proof on an operational Australian Government site
A 12-month deployment on an existing 73 kW packaged HVAC unit—independently measured and verified by CSIRO and METHREP.
CSIRO + METHREP
24,570 kWh p.a.
2.39-year payback
MEASURED RESULT
40.6%
measured annual HVAC savings
Existing HVAC retained
Australian Government site · existing plant retained
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01 / THE CHALLENGE
Prove the saving without compromising an operational site
The Australian Government site needed evidence that HVAC efficiency could be improved on existing assets while preserving the building conditions the facility depended on.
The result had to withstand independent technical scrutiny—not just show a lower bill. That meant measuring electrical input, HVAC output and maintained conditions over a full 12-month period.
The test was not simply whether energy could be saved—it was whether every saving could be measured and defended.
BUILDING PROFILE
Asset overview
Facility
Office / classroom
HVAC system
73 kW dual-circuit packaged unit
Deployment
Australian Government site with BGIS
Monitoring
12 months
Verification
CSIRO NP0031 + METHREP
02 / THE CRESSTEC APPROACH
Measure what it uses. Measure what it produces. Control from both.
HDAC builds the proof into the optimisation process—on the equipment already installed. Anything less isn't HDAC.
01
Instrument the unit
Sub-meter overall power and each compressor, then measure conditions and delivered HVAC capacity across both circuits.
02
Optimise from both sides
Deterministic AI uses energy consumed and output produced to optimise operation while maintaining the required environment.
03
Verify over 12 months
Compare like-for-like operating data and subject the measured result to independent CSIRO and METHREP review.
Independent evidence, built on a live site.
03 / VERIFIED RESULTS
The deployment converted an operational result into a defensible engineering and commercial case for wider adoption.
40.6%
Annual HVAC savings
Measured over 12 months
24,570
kWh saved p.a.
Existing plant retained
16.22 t
COâ‚‚-e avoided p.a.
Measured reduction
2.39 yrs
Simple payback
At $0.22/kWh
BUSINESS CASE VS MEASURED RESULT
Measured performance exceeded the pre-install estimate.
04 / BUSINESS OUTCOME
Measured. Defensible. Ready for a decision.
Independent review
CSIRO and METHREP
Monitoring period
12 months
System approach
HDAC retrofit to existing HVAC
Predictive-maintenance case
1.21-year payback including benefit