Data and technology: strengthening our understanding for better retrofit outcomes
This report sits within the National Retrofit Hub’s Measuring Outcomes and Impact Evaluation project, delivered with Arup and supported by Impact on Urban Health and TrustMark. It explores how real-world performance data, including SMETER-HTC, can support better planning, design and delivery of retrofit.
Many schemes still rely on predicted performance and EPC ratings, which often fail to reflect how homes actually perform. Our report highlights how pre-retrofit measured data can reduce risk, avoid abortive works, target the right homes and improve resident experience. Stronger baselines can also support more confident, locally-led delivery.
Wider use of measured data will require updates to funding and policy frameworks. Current grant schemes often use EPC ratings alone, without asking for thermal performance evidence. Aligning eligibility criteria with measured data would help drive systemic change across the supply chain.
This is a key moment for building performance policy. The Warm Homes Plan, Future Homes Standard and EPC reform could all adopt real-world data to reward true performance.
Our report explores how SMETER-HTC, combined with other datasets, can create a more accurate baseline for decision makers at every stage of retrofit.
Recommended next steps include:
- Further research in combining different forms of measured data with SMETER-HTC
- Setting minimum data standards for portfolio decisions
- Embedding performance-based approaches in funding frameworks
- Providing guidance for landlords on using calculated HTC data
- Improving validation support for interpreting outputs
- Continuing sector dialogue on consistent measurement standards
Download the full report to explore the findings and recommendations.
