The rebranding from Radiator Labs to Kelvin reflects the company's growth beyond radiators, including expansion into the US and European markets and targeting older building decarbonization where emissions reduction is a vital climate goal. The Series A round was led by climate-focused venture capital firm 2150, with participation from the Schmidt Family Foundation, the Partnership Fund for NYC, and several previous investors. The funds will be used to hire talent and build a scalable platform for accelerating the adoption of economically and environmentally sustainable HVAC options worldwide.

Kelvin, formerly Radiator Labs, is a national leader in intelligent HVAC solutions for legacy buildings in major cities. The company designs and installs cutting-edge systems that decarbonize, save money, and provide comfort and temperature control within buildings without prematurely retiring existing systems.