CASE STUDY — Showroom/Retail · Brisbane, QLD
A verified result designed for a portfolio decision
A measurement-led retrofit to existing packaged rooftop units, creating a clear evidence trail for a multi-site rollout.
CSIRO reviewed
28.90 t CO₂-e
1.87-year payback
MEASURED RESULT
48.5%
measured annual HVAC savings
Existing HVAC retained
Real-world showroom site · Oxley, Queensland
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01 / THE CHALLENGE
Prove savings before scaling across a retail network
Showroom/Retail HVAC runs for long hours across changing weather, occupancy and trading conditions. Fixed strategies can hide avoidable energy use, while portfolio teams still need clear evidence that any intervention works.
The deployment had to improve performance on the installed equipment and create a measurement trail robust enough for independent verification and a multi-site rollout.
The decision was not simply whether energy could be saved—it was whether every saving could be measured and defended.
BUILDING PROFILE
Asset overview
Facility
Big-box retail showroom
Location
Brisbane metropolitan area
HVAC system
Existing packaged rooftop units
Deployment
Multi-site model
Verification
IPMVP Aligned A/B toggle testing, continuous equipment-level M&V
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
Measure electrical input and the refrigeration output delivered by each HVAC unit.
02
Optimise from both sides
Use the relationship between energy consumed and cooling produced to improve operation without replacing plant.
03
Verify before scaling
Establish a measured result, subject it to independent review, then use the proof to support rollout.
One site became a portfolio-level decision.
03 / VERIFIED RESULTS
Material savings and independent review created the evidence needed to assess a wider rollout.
48.5%
Annual HVAC savings
Measured result
CSIRO
Independent review
Evidence-led verification
28.90 t
CO₂-e avoided p.a.
Measured reduction
1.87 yrs
Estimated payback
Improved from 3.32 years
BUSINESS CASE VS MEASURED RESULT
Measured performance exceeded the pre-install estimate.
04 / BUSINESS OUTCOME
Measured. Defensible. Ready for a decision.
Site type
Big-box retail showroom
Deployment
Multi-site model
Verification
IPMVP Aligned A/B toggle testing, continuous equipment-level M&V
System approach
HDAC retrofit to existing HVAC