Methods and apparatus for recovering heat from disposed effluents are disclosed herein. In some embodiments, an apparatus may include a first process chamber configured for gaseous or liquid processes; a second process chamber configured for liquid processes; and a heat pump having a compressor and a first heat exchanger, wherein the compressor is configured to use a first effluent exhausted from the first process chamber and wherein the first heat exchanger having first and second sides configured to transfer heat therebetween, wherein the first side is configured to flow a liquid reagent therethrough and into the second process chamber, and wherein the second side is configured to flow the pressurized first effluent from the first process chamber therethrough. In some embodiments, a heater may be disposed between the heat pump and the second process chamber to further heat the liquid reagent prior to entering the second process chamber.