Anzen

Anzen is a London-based clean tech start-up developing the world's first plug-and-play solid-state heat pump — the Anzen Climate Wall — designed to decarbonise the 12.5 million UK homes that are unsuitable for conventional heat pump systems. Traditional heat pumps require refrigerants, outdoor units, specialist installation and significant structural modification, making them inaccessible for flats, older buildings and properties in fuel poverty. Anzen's thermoelectric Peltier technology eliminates all of these barriers, delivering heating, cooling and heat recovery ventilation in a single wall-integrated unit that can be fully installed in under two hours.

Founded in 2022 by Dhruv Shah and Preethi Jayakumar, both graduates of the University of the Arts London, Anzen was born from direct personal experience of inadequate heating and poor indoor air quality. The founders developed their first prototypes at Park Royal Open Workshop in London, progressing from woodworked mockups to CE-certified systems through iterative hardware design. The company has since run commercial pilots with housing providers including Islington Council and other organisations with net-zero targets, validating the product in real-world conditions.

Anzen has been supported by Carbon13, Sustainable Ventures, Desai Ventures and One Planet Capital, and raised £1.1 million in pre-seed funding in 2025 from Green Angel Ventures and others. The company is targeting a broader commercial rollout in 2026, with its sights set on making clean, accessible home heating available to all UK households and decarbonising one million homes by 2035.