Clean energy installation specialist Installio has raised £1.5m in an oversubscribed seed round led by Verb Ventures, as the fast-growing London-based company prepares for nationwide expansion amid rising demand for heat pumps and home energy retrofits.
Founded to address the biggest bottleneck in the UK’s clean heating transition – inconsistent, low-quality installations – Installio combines technical expertise with a technology platform that streamlines complex heat pump projects from start to finish. The company provides real-time project visibility, compliance monitoring and access to highly vetted installers, enabling its partners to execute large-scale retrofit programs to consistent standards.
The new investment will support Installio’s nationwide expansion and the development of its next-generation installer platform. In 2025, the company opened four new regions in the south of England and recorded 40% month-on-month sales growth, while installation volumes doubled every two months.
Installio already works with major energy suppliers and retailers, including E.ON Next, Aira and Good Energy, as well as developers, house builders and housing associations.
Co-founder and CCO William Hoyer Millar said the company is “setting a new standard for clean energy installations.”
“Heat pumps are only as good as the systems behind them, and fluctuating quality has slowed acceptance for too long. Our technology ensures high performance at all times – and gives partners the certainty that complex retrofitting work is carried out correctly and on a large scale.”
CEO Michael May added that homeowners will directly benefit: “Our platform makes installations smoother, warmer and more efficient. This seed funding allows us to expand nationwide and further build out the technology that supports our teams on the ground.”
Alex Chikunov, partner at Verb Ventures, said Installio represents the infrastructure needed to transition to clean heating in the UK:
“The transition isn’t just about new technology – it’s also about the operational ability to reliably deliver thousands of quality installations. Installio sits at the perfect intersection of technology and engineering.”
Non-executive director Lord Martin Callanan, a former energy secretary, described heat pumps as “critical national infrastructure”.
“Every heat pump installation reduces the UK’s exposure to volatile global gas markets and strengthens energy independence,” he said. “Installio’s scalable, high-quality delivery is exactly what the industry needs.”
The investment comes as the UK’s heat pump installations accelerate – up 56% in the first half of 2025 – ahead of new regulations making clean heating systems the standard from 2026. Studies suggest rapid deployment could boost GDP by £4.8 billion and create 80,000 jobs by 2030.
With more than £13 billion of government funding earmarked for home energy retrofits, installation capacity remains the sector’s biggest challenge. In recent years, poor fits have damaged consumer trust, making proven quality and compliance essential.
Installio’s technology-enabled delivery model aims to bridge this gap and ensure heat pumps and other clean energy systems are installed quickly, compliantly and at scale to support the UK’s transition to affordable, low-carbon home heating.
