Carbon Impact Tool

Our Carbon Impact Tool facilitates understanding of the energy, carbon, and cost savings associated with organisational efforts to make home retrofit improvements within the communities they serve. The tool assesses the alteration in net energy demand between original and retrofitted homes, considering the savings from various improvement types or their combinations.

This enables organisations to autonomously track, report and communicate the benefits of their efforts, leading to additional investment opportunities to further support more households to live more comfortable and healthy lives.


Data And Parameters

The tool’s accuracy comes from its comprehensive consideration of over 50 distinct parameters from numerous data sources, such as customer data, Energy Performance Certificates (EPC), Ofgem, PVGIS Europa solar data and custom built predictors. Energy demands modelled include water heating, electrical appliances, and home heating, with the latter accounting for losses from walls, floors, roofs, drafts, and thermal bridges. Notably, the tool subtracts local energy generation, like solar panel outputs, considering factors like self-use, battery storage capacity, and energy exportation.

Savings And Outputs

The Carbon Impact Tool calculates savings in carbon and cost for every fuel type, factoring in carbon intensity and average fuel prices. Home modifications that can be analysed by the tool include:

  • Insulation
  • New Gas Boiler
  • Glazing
  • Solar panels
  • Solar Thermal
  • Ground Source Heat Pump
  • Air Source Heat Pump
  • Biomass Heating System


Quantifiable Impact: Through the Carbon Impact Tool, organisations can effectively measure and showcase the tangible environmental impact of their loans.

Informed Decision Making: By understanding the potential savings of each home retrofit, this information can be grouped regionally, enabling organisations to monitor where loans are making the most impact to inform future decision making.

Promotion of Sustainable Practices: Demonstrating the value and feasibility of incorporating sustainability and energy efficiency into homes within communities served.

Long-Term Cost Savings for Customers: By financing energy-efficient home modifications, organisations’ customers not only reduce their carbon footprint but also benefit from lowered energy bills in the long run.