What is the performance gap in HVAC systems?
The performance gap refers to the difference between how a heating and cooling system is designed to perform and how it actually performs in real life. While many HVAC projects achieve design-stage approvals based on simulations or load calculations, the reality post-installation is often very different.
The causes vary: unbalanced systems, poor commissioning, outdated control strategies, or improper maintenance. But the result is always the same—higher energy bills, comfort complaints, and missed decarbonisation targets.
The hidden costs of underperformance
When systems fail to live up to expectations, building owners pay the price. Operational costs rise over time, energy waste becomes embedded in day-to-day performance, and the carbon footprint grows larger than projected.
More than that, underperforming systems erode trust—especially for public, commercial, or institutional projects under increasing pressure to meet ESG or regulatory targets. A building that doesn't deliver on its promise of energy savings can delay sustainability reports or even impact certifications.
One way to prevent this is by proactively managing performance across your HVAC portfolio ›
Strategies for closing the gap
Bridging the divide between theoretical design and actual operation starts with clarity. The most effective technical teams now rely on continuous performance monitoring—ideally based on digital twins or simulation overlays—to track how systems evolve over time.
More advanced strategies include:
- Comparing measured values with expected benchmarks in real time
- Using diagnostics to spot root causes like poor valve authority or sensor drift
- Aligning maintenance workflows with actual system needs
- Verifying retrofit results against baseline performance
The goal isn’t just to spot problems, but to keep systems optimised long after installation.
Why closing the gap delivers long-term value
When you can trust that your systems are working as designed, the benefits stack up quickly:
- More predictable energy savings
- Lower operating costs
- Higher occupant satisfaction
- Easier reporting for funding, audits, and compliance
- Stronger cases for future investment
It’s not just about short-term wins. Eliminating the performance gap creates lasting confidence in your HVAC decisions—technical, financial, and environmental.
That’s why continuous HVAC performance management is becoming the new standard ›
FAQ: Eliminating the performance gap