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Installio raises £1.5m Seed round to accelerate national clean-energy rollout

November 25, 2025

Clean-energy installation specialist Installio has raised £1.5 million in an oversubscribed Seed round led by Verb Ventures, as the fast-growing London-based company prepares to scale nationally amid surging demand for heat pumps and home-energy retrofits.

Founded to tackle the biggest bottleneck in the UK’s clean-heating transition — inconsistent, low-quality installations — Installio combines specialist engineering expertise with a technology platform that streamlines complex heat-pump projects from end to end. The company provides real-time project visibility, compliance oversight and access to highly vetted installers, enabling partners to deliver large-scale retrofit programmes at consistent standards.

The new investment will support Installio’s nationwide expansion and the development of its next-generation installer platform. In 2025, the company launched four new regions in the South of England, recording 40% month-on-month revenue growth, while installation volumes have doubled every two months.

Installio already works with major energy providers and retailers including E.ON Next, Aira and Good Energy, as well as contractors, housebuilders and housing associations.

Co-founder and CCO William Hoyer Millar said the company is “setting a new standard for clean-energy installs”.
“Heat pumps are only as good as the installs behind them, and for too long inconsistent quality has held back adoption. Our technology ensures high performance every time — and gives partners confidence that complex retrofit work will be delivered correctly, at scale.”

CEO Michael May added that homeowners benefit directly: “Our platform makes installations smoother, warmer and more efficient. This Seed funding allows us to expand nationally and keep building the technology that supports our teams on the ground.”

Verb Ventures partner Alex Chikunov said Installio represents the infrastructure needed for the UK’s clean-heating transition:
“The transition isn’t just about new technology — it’s about the operational capability to deliver thousands of quality installs reliably. Installio sits at that perfect intersection of tech and engineering.”

Non-executive director Lord Martin Callanan, former Energy Minister, described heat pumps as “critical national infrastructure”.
“Every heat-pump installation reduces Britain’s exposure to volatile global gas markets and strengthens energy independence,” he said. “Installio’s scalable, high-quality delivery is exactly what the sector needs.”

The investment arrives as UK heat-pump installation accelerates — up 56% in the first half of 2025 — ahead of new regulations making clean-heating systems standard from 2026. Studies suggest rapid deployment could add £4.8 billion to GDP and create 80,000 jobs by 2030.

With more than £13 billion in government funding earmarked for home-energy retrofits, installation capacity remains the sector’s defining challenge. Poor-quality fits in recent years have damaged consumer confidence, making verifiable quality and compliance essential.

Installio’s technology-enabled delivery model aims to close that gap — ensuring heat pumps and other clean-energy systems are installed quickly, compliantly and at scale, supporting the UK’s transition to affordable, low-carbon home heating.