Installio develops a technology platform that arms heat-pump installers with the digital tools and processes needed to deliver consistently high-quality retrofit projects. By partnering with major energy providers such as E.ON Next, Aira and Good Energy—as well as contractors, house builders and housing associations—the company aims to accelerate nationwide adoption of clean-energy systems. Its software standardises installation workflows, giving partners confidence that complex retrofit work can be executed correctly and at volume. Co-founder and CCO William Hoyer Millar positions the firm as setting “a new standard for clean-energy installs.” The business plans a national rollout of its offering across the UK and aspires to become a leading clean-energy delivery platform. To fuel this expansion, it has secured £1.5 million in seed funding. Former UK energy minister Lord Martin Callanan serves as a company director, reinforcing the firm’s policy and industry credentials.

Total raised

$2M

Funding rounds

1

Latest round

Seed

Latest activity

Nov 2025