A digital twin's ongoing cost doesn't scale primarily with building size - it scales with the number and complexity of systems actually being monitored and integrated, which is why a smaller hospital's digital twin can genuinely cost more to maintain than a larger, simpler commercial building's equivalent.
| Building type | Relative digital twin complexity | Primary cost driver |
|---|---|---|
| Standard commercial (office, retail) | Lower | Relatively standard HVAC, lighting and access control systems - fewer integration points |
| Hospital | Higher | Medical equipment integration, critical system redundancy monitoring, infection-control HVAC zoning, life-safety system criticality |
| Airport | Highest | Vast number of integrated systems (baggage, security, MEP, passenger flow) across a very large facility, often with 24/7 operational continuity requirements |
What This Means for Scoping a Digital Twin Investment Realistically
A commercial building's digital twin business case rests mainly on energy optimisation and predictive maintenance value - genuinely valuable, but a comparatively contained scope relative to hospital or airport twins. Hospital digital twins carry a stronger safety-criticality justification, since equipment failure has direct patient-safety implications, which changes the underlying cost-benefit calculation from a pure efficiency argument into a genuine risk-mitigation one.
A Scenario Showing Why Partial Scoping Often Makes the Most Sense
Picture a hospital weighing a full-facility digital twin against instrumenting only its most critical systems - central medical gas supply, backup power, infection-control HVAC zones - rather than the entire building. The partial approach captures much of the genuine safety-critical value at a considerably lower cost than full instrumentation, and is increasingly the practical, sensible default for facilities that see clear value in the digital twin concept but can't justify the cost of instrumenting every system uniformly.