Microporous MOFs with high water uptake capacity are gaining attention for low temperature heat transformation applications in thermally driven adsorption chillers (TDCs) or adsorption heat pumps (AHPs) (Fig. 1). TDCs or AHPs are an alternative to traditional air conditioners or heat pumps operating on electricity or fossil fuels. By using solar or waste heat as the operating energy TDCs or AHPs can significantly help to minimize primary energy consumption and greenhouse gas emissions generated by industrial or domestic heating and cooling processes. TDCs and AHPs are based on the evaporation and consecutive adsorption of coolant liquids, preferably water, under specific conditions. The process is driven and controlled by the microporosity and hydrophilicity of the employed sorption material. Here we summarize the current investigations, developments and possibilities of MOFs for the use low temperature heat transformation applications as alternative materials for silica gel, aluminophosphates or zeolites.[1]figureFig. 1 Principle of adsorption chilling or adsorption heat pump. Top: The infrared photograph in the right part visualizes the different temperature levels after opening the manual valve with cooling to –5 °C of the water container and heating to 45 °C of the sorbent material thereby depicting the working cycle. Bottom: 1. Working cycle: A working fluid (typically H2O) is evaporated at low pressure by application of evaporation heat Qevap, and adsorbed at a microporous material, releasing adsorption heat Qads. 2. Regeneration cycle: When the adsorbent is saturated, driving heat Qdes is applied for desorption of the working fluid. The vapour then condenses in a cooler, and condensation heat Qdes is released. Low temperature heat is depicted in blue, medium T heat in green and high T heat in red.