Thermova: bulk EPC matching for 2030 compliance, plus a real-time savings calculator

The bottleneck

UK rental properties face a hard 2030 deadline: every let must hold an EPC of band C or above. A meaningful proportion of the rental stock currently sits at D or worse. Landlords and letting agents need to triage their portfolios quickly — which properties already pass, which need work, which qualify for grants, and what the most cost-effective upgrade path is.

The off-the-shelf option is manual: look up each property in the national EPC register, copy-paste the band, decide what to do. For a portfolio of a hundred properties, that's a day of work. The data is then static — outdated as soon as a property gets upgraded.

On the consumer side, homeowners researching heat pumps, solar, and insulation are drowning in vendor websites that quote vague savings ranges and never explain what specifically applies to their situation. The £7,500 boiler upgrade scheme grant is widely advertised but rarely tied to a specific property's eligibility.

What I built

Thermova was engineered as a bespoke platform combining a B2B portfolio-audit engine with a B2C consumer-facing service.

• Bulk EPC matching engine. Upload a CSV of property addresses; the system matches against the national EPC register using Jaccard string similarity. Each row gets a match-confidence score (high / medium / low / not-found). Bulk processing happens in minutes instead of a day.
• RdSAP 10 corrected-EPC workflow. Where a property's EPC is wrong or out of date, the system runs the corrected-EPC process end-to-end: Pulse air permeability testing booking, RdSAP 10 calculation, ATTMA Level 1 lodgement, and a customer-facing report.
• Live fuel-price database. Quarterly-updated fuel costs (electricity, gas, oil, LPG) sourced from Ofgem and BoilerJuice power a live savings calculator that gives prospective customers a specific number for their property — not a vendor-generic range.
• Lead enquiry triage. Inbound enquiries capture property type, current heating system, and interest type, then route to the right service category (heat pump / solar / insulation / EPC audit). Survey-worthy leads get prioritised; tyre-kickers get filtered.
• Grant integration. Where a property qualifies for the £7,500 boiler upgrade scheme (or £9,000 oil/LPG variant), the eligibility is surfaced in the customer journey rather than buried in vendor T&Cs.

What changed

For Thermova's B2B portfolio clients:

• Bulk portfolio audits processed in minutes instead of a day per hundred properties.
• RdSAP 10 corrected-EPC workflow that handles the regulated end-to-end pipeline — no separate tooling for assessment vs. lodgement.
• Match-confidence scoring that flags ambiguous addresses for human review rather than producing false matches.

For consumer-side traffic:

• Live-data savings calculator that gives property-specific numbers, not vendor ranges.
• £7.5k grant eligibility surfaced in the customer journey rather than buried in vendor T&Cs.
• Structured lead triage that distinguishes survey-worthy enquiries from tyre-kickers.

The platform continues to evolve alongside changing UK regulation — the 2030 rental EPC C deadline is the next major load-bearing capability the system is being shaped around.