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Demo listing — this is sample content created to show how a pitch looks on Foundsy. It is not a real opportunity and cannot be invested in.

DEMO · Warmstone

DEMO LISTING — a phase-change thermal store that lets a heat pump run when electricity is cheapest.

£240k

raising

9%

equity

0%

match to you

UK

Cardiff, UK

DEMO · Warmstone — Climate prototype imagery

The problem

This is a demonstration listing, not a real opportunity. Heat pumps run when the house is cold, which is when electricity is dearest.

Our solution

DEMO · Warmstone answers that with a single focused product: DEMO LISTING — a phase-change thermal store that lets a heat pump run when electricity is cheapest. The build is deliberately narrow — one problem, one buyer, one measurable outcome — so the capital being raised converts directly into evidence rather than overhead.

Why now?

Climate buyers are being pushed by cost and regulation at the same moment, and the enabling components have only recently reached a price the model can carry. A year ago this was expensive; in three years it will be crowded.

Market opportunity

Example content: 1.8 million UK heat-pump installations forecast by 2032.

TAM£100.8MTotal market as defined by the founder
SAM£21.2MServiceable with the current model
Initial market£3.5MReachable in the first 24 months

Business model

Example content: sold through installer networks as a bolt-on unit.

Progress

  • Opportunity documented on Foundsy
  • Working prototype complete
  • IP filed or granted
  • Verification in review
  • Pre-commercial
  • 8% of the round committed
Prototypes3
Shift achieved6.5 hrs
Installers4 waiting

  • Jul 2026

    Demo milestone: bench rig shifted 6.5 hours of demand off peak.

Funding

£240k sought

  • Engineering45%
  • Home trials30%
  • Certification25%

Intellectual property & disclosure

Demo content — illustrative provisional filing.

PublicVisible to anyone browsing Foundsy.
  • Description and sector
  • Problem being solved
  • Stage and level
  • Funding sought
🔒 Verified investorsUnlocked once your investor identity is verified.
  • Full market analysis
  • Founder background and track record
  • Development progress
  • Use of funds detail
🔒 NDA requiredReleased by the founder after you sign and are logged.
  • 🔒 DEMO Prototype report.pdf
  • 🔒 Technical drawings
  • 🔒 Patent detail
  • 🔒 Financial model

🔒 Confidential data room

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