Abstract: An isothermal equilibrium system takes point sources of heat generated by the operation of heat generating components and spreads the heat throughout the system where the heat may be dissipated. An atomizer for atomizing a liquid coolant, is positioned inside a sealed housing. The atomized liquid coolant is distributed as a thin film over the surface of the heat generating components and the wall of the sealed housing. Heat is transferred from the surface of the heat generating components by vaporization of at least a portion of the thin film of liquid coolant. The coolant vapor condenses on the housing and other cool surfaces and returns to the liquid state. The system heat is then removed from the outer surfaces of the housing using conventional heat transfer mechanisms including free or forced air convection and/or circulation of liquid coolant over the exterior of the housing. If additional cooling is desired, heat exchanger tubes may be included inside the sealed housing.