Zero Entropy is a Danish climate-tech startup developing a Power Expander for transcritical CO₂ refrigeration and heat pump systems. The technology targets one of the less visible sources of inefficiency in the cycle: energy normally lost during expansion. By recovering part of that loss and converting it into useful electrical output, the technology can improve system efficiency and add cooling capacity. When we started working with Zero Entropy, there was no established brand or digital presence, and the product itself was still being developed and tested. The challenge was therefore not simply to communicate an existing product, but to make an emerging technology understandable, tangible and credible before it had reached the market. We developed a visual identity that combines technological precision with an industrial character. With no finished product to rely on, 3D visualisation became a central tool for giving form to the technology and making its function easier to grasp. The identity was extended across presentations and a focused digital experience, creating a coherent presence for conversations with partners, pilot customers and the wider industry. As Zero Entropy moves from prototype validation towards pilot installations and OEM partnerships, the identity provides a platform that can evolve with the company — helping turn a highly technical idea into something people can see, understand and engage with.