Thermova: bulk EPC matching for 2030 compliance, plus a real-time savings calculator
Thermova is a bespoke renewable-energy platform serving UK homeowners and landlords. The headline build is an EPC matching engine that processes bulk property portfolios against the national register using string-similarity scoring — turning a day of manual lookups into a few minutes. Underneath sits a RdSAP 10 corrected-EPC workflow (Pulse air permeability testing + lodgement) and a live fuel-price database feeding customer-facing savings calculators.
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 The data is then static — outdated as soon as a property gets upgraded.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 Where a property's EPC is wrong or out of date, the system runs the corrected-EPC process end-to-end: Pulse air permeability testing booking, RdSAP 10 calculation, ATTMA Level 1 lodgement, and a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.
By the numbers
Operational metrics across the EPC compliance pipeline and the consumer-facing service. Verifiable from the platform code and the live site.
Services used in this build
The capability and service pages this engagement delivered against. Use them to scope a similar build for your operation.
Custom AI Systems →
Bulk EPC matching against the national register with Jaccard similarity scoring and match-confidence indicators.
AI Apps & Websites →
The bespoke EPC compliance platform — customer journey, savings calculators, scheme eligibility.
Document Automation (use case) →
EPC reports, RdSAP 10 workflow, Pulse air permeability testing, ATTMA Level 1 lodgement.
AI Systems Integration →
EPC register, ATTMA, Ofgem + BoilerJuice fuel-price feeds — integrated into one compliance surface.
Questions about this build
From 2030, all rental properties in England and Wales must hold an EPC of band C or above to be legally let. A meaningful slice of the rental stock currently sits at D or worse. The Thermova system identifies which properties in a portfolio need work, what the upgrade path looks like, and (where applicable) which qualify for the £7,500 boiler upgrade scheme grant or the £9,000 oil/LPG variant.
RdSAP 10 is the current standard for reduced-data Standard Assessment Procedure — the methodology behind UK EPCs. A "corrected EPC" workflow combines RdSAP 10 calculations with Pulse air permeability test results, lodged by an ATTMA Level 1 certified operator. Off-the-shelf EPC tools handle the calculation, but the Thermova system integrates the test → calculation → lodgement → customer-facing report pipeline end-to-end.
A landlord or letting agent uploads a CSV of properties (address, postcode, optionally UPRN). The system matches each row against the national EPC register using Jaccard string similarity, returning a match-confidence score (high / medium / low / not-found). Properties that match with confidence get their current EPC band surfaced in seconds; properties that don't match get triaged for manual lookup. Bulk portfolios that used to take a day get processed in minutes.
A consumer-facing service for homeowners and landlords covering EPC compliance, heat pump installs (with the £7,500 grant integration), solar + battery, and insulation. Live fuel-price data feeds the customer savings calculator. Lead enquiries route into a structured intake (property type, current heating, interest type) that triages survey-worthiness before a sales call.
Still have a question? Book a discovery call — direct line to me, Dean.
Other industries I've built for
Different operations, same engineering discipline.
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