Thermal Transformer de-electrifies cooling by converting low-grade waste heat into useful cooling energy. Our novel heat-driven adsorption chiller operates on waste heat from as low as 45°C, reducing electricity consumption for cooling by up to 98% compared to conventional electric chillers. This directly addresses one of the most pressing challenges facing AI data centers: growing cooling demand against constrained power infrastructure. Our technology cuts total data center electricity consumption by up to 30%. In industrial gas compression, it reduces suction gas temperatures by 30–40°C, improving compressor mass flow by 5–10% and cutting electricity demand by ~15%.