Unlike conventional due diligence inspections that focus primarily on visible defects or compliance observations, our methodology investigates how the building actually performs operationally, how the systems interact with one another, and whether the building is being managed in a manner that protects long-term asset value.

Our background across HVAC, Building Management Systems (BMS), electrical infrastructure, mechanical electrical systems, controls integration, energy management, and facility operations allows us to approach Technical Due Diligence from both an engineering and operational perspective.

This is particularly valuable in older commercial buildings, retail shopping centres, mixed-use developments, unsupervised facilities, and regional assets where years of operational drift, inconsistent maintenance practices, deferred upgrades, or poor contractor management can create hidden operational risks that are not immediately obvious during a standard inspection.

Many buildings appear functional on the surface while simultaneously carrying significant exposure in areas such as:

• HVAC inefficiency
• Controls instability
• BMS obsolescence
• Excessive after-hours energy consumption
• Failing ventilation systems
• Poor maintenance governance
• Asset lifecycle deterioration
• Mechanical services switchboard concerns
• Incomplete documentation
• Contractor performance deficiencies
• Compliance vulnerabilities
• Unreliable alarm management
• Inaccurate asset registers
• Unresolved historical defects

Our Technical Due Diligence reviews are designed to uncover these issues before they evolve into major operational, financial, compliance, or capital expenditure problems.

We assess not only the physical condition of the infrastructure, but also the operational logic and management strategies supporting the building.

This includes evaluating:

• Whether systems are operating in accordance with their design intent
• Whether maintenance contractors are delivering meaningful technical outcomes
• Whether controls strategies remain effective
• Whether energy management systems are functioning correctly
• Whether trend logs and alarms are being used properly
• Whether the building has drifted operationally over time
• Whether lifecycle planning has been proactive or reactive
• Whether the facility is positioned for future operational stability

Our assessments commonly include detailed investigations into:

We review the operational condition, efficiency, maintainability, and lifecycle position of key HVAC and mechanical services infrastructure including:

• Chillers
• Boilers
• Cooling towers
• Air handling units
• Fan coil units
• Condenser water systems
• Pumps
• Variable speed drives
• Car park ventilation systems
• Toilet exhaust systems
• Stair pressurisation systems
• Smoke exhaust systems
• Tenant supplementary HVAC systems
• Outside air systems
• Building pressurisation strategies

Our reviews extend beyond simple plant condition observations.

We investigate whether systems are operating efficiently, whether plant sequencing remains optimised, whether control strategies remain appropriate for current occupancy demands, and whether systems have been properly recommissioned following upgrades or modifications.

In many older buildings, systems may continue operating despite substantial deterioration in overall performance. Common issues can include poor temperature control, simultaneous heating and cooling, excessive fan speeds, unstable pressure control, overridden safety logic, failed actuators, poorly calibrated sensors, ineffective time schedules, and bypassed operational sequences.

These issues often remain undetected for years while contributing to increased energy consumption, reduced occupant comfort, higher maintenance costs, and accelerated asset degradation.

This includes investigations into:

• Mechanical services switchboards
• Main switchboards
• Essential and non-essential electrical systems
• Generator infrastructure
• Distribution systems
• Mechanical electrical controls
• VSD installations
• Electrical protection strategies
• Power quality concerns
• Energy metering systems
• Lighting systems
• Emergency systems interfaces
• Controls power supplies
• Electrical maintenance governance

Our background in both controls and electrical systems provides a unique advantage during Technical Due Diligence assessments because many operational problems originate from the relationship between the field infrastructure and the controls layer.

It is not uncommon to discover buildings where the BMS graphics appear functional while underlying field conditions reveal substantial operational concerns such as:

• Failed VSD communications
• Incorrect motor staging
• Bypassed safeties
• Unstable control voltages
• Incomplete integration works
• Poorly installed modifications
• Legacy switchboard alterations
• Non-functional status monitoring
• Inaccurate energy metering
• Inconsistent fault reporting

We assess whether the infrastructure supporting the building systems is technically sound, maintainable, compliant, and capable of supporting long-term operational requirements.

Our background across Niagara / Tridium platforms, HVAC controls, electrical integration, and commercial building operations allows us to perform highly detailed operational reviews of BMS infrastructure and building controls strategies.

In many commercial buildings, the BMS is intended to act as the operational intelligence layer of the facility.

However, over time, many systems suffer from:

• Incomplete commissioning
• Poor graphics development
• Inaccurate point mapping
• Failed field devices
• Obsolete controllers
• Unstable communications networks
• Inconsistent scheduling
• Excessive alarm generation
• Sensor drift
• Unresolved historical faults
• Contractor neglect
• Poor trend log management
• Uncontrolled operator overrides
• Lack of optimisation
• Legacy integration limitations

As a result, many buildings gradually drift away from their original operational intent while still appearing superficially operational.

This operational drift often creates substantial hidden costs through energy waste, unnecessary equipment runtime, occupant complaints, poor plant sequencing, increased maintenance demand, and reduced equipment lifespan.

Our Technical Due Diligence process investigates how the BMS is truly functioning operationally — not simply whether the graphics are online.

We assess:

• Niagara / Tridium platforms
• Legacy BMS systems
• BACnet networks
• Modbus integrations
• HVAC controls strategies
• Energy monitoring systems
• Alarm management structures
• Trend logging functionality
• Scheduling logic
• Sensor calibration accuracy
• Mechanical plant sequencing
• VSD control strategies
• Tenant controls integration
• Car park ventilation controls
• Fire mode interfaces
• Remote monitoring capability
• Integration architecture
• Controller obsolescence
• Network stability
• Cybersecurity exposure
• Operator usability
• Energy optimisation capability

Our investigations frequently uncover situations where systems have technically remained operational for years despite major degradation in functionality beneath the surface.

Examples commonly identified include:

• Schedules operating permanently in manual override
• Failed sensors forcing unstable plant control
• Disabled alarms masking critical failures
• VSDs running permanently at fixed speeds
• Plant operating outside occupancy hours
• Excessive simultaneous heating and cooling
• Failed trend logs preventing meaningful diagnostics
• Incorrect BACnet point mappings
• Obsolete JACE hardware approaching end-of-life
• Graphics no longer matching field conditions
• Fault alarms permanently ignored
• Integration points no longer communicating
• Poorly tuned control loops causing instability
• Mechanical plant sequencing inefficiencies
• Legacy field controllers no longer supported

In many older commercial buildings and shopping centres, these issues can persist for years without being identified because the building still appears to be functioning from a tenant perspective.

However, the operational inefficiencies and hidden risks can become significant over time.

Our BMS Due Diligence reviews help stakeholders better understand:

• Whether the controls strategies remain effective
• Whether the BMS is delivering meaningful operational value
• Whether upgrades or modernisation should be considered
• Whether energy optimisation opportunities exist
• Whether the building is operating efficiently
• Whether remote monitoring capability is adequate
• Whether contractor maintenance practices are technically sound
• Whether the building systems remain aligned with operational requirements

This is particularly important for:

• Commercial office buildings
• Retail shopping centres
• Mixed-use developments
• Strata towers
• Regional facilities
• Unsupervised buildings
• Older B-Grade and C-Grade commercial assets
• Buildings with ageing controls infrastructure

Our engineering-led approach helps clients move beyond superficial reporting and gain meaningful operational insight into how their building systems are actually performing day-to-day.

Ultimately, an effective Building Management System should not simply monitor alarms — it should actively contribute to operational stability, energy efficiency, asset protection, occupant comfort, and long-term building performance.