Waste heat dissipation, using evaporation heat transfer, is highly desirable in applications involving components that generate a persistent heat flux, due to the temperature uniformity experienced during evaporation. This form of heat transfer requires continuous feeding of liquid to the entire heated surface and mitigating the formation of dry spots. With complete liquid coverage, evaporation heat transfer results in a temperature uniformity across the heated surface due to phase change at the liquid-vapor interface. Aluminum High-Temperature Conductive Microporous Coating (Al-HTCMC) is highly effective in spreading liquid over a surface. It is fabricated by brazing aluminum particles (dp = 11, 24, 66, or 114 µm) onto a flat aluminum surface. This coating is applied on a large vertical aluminum plate (50.8 mm wide × 152.4 mm tall × 3.3 mm thick). Rate of rise experiments with highly wetting fluids (ethanol, acetone, and methanol) are performed, at room temperature and atmospheric pressure, where the bottom of the coated plate is submerged in a pool of liquid to investigate the effect of the particle size on permeability and effective meniscus radius within the Al-HTCMC. Evaporation experiments are also conducted using ethanol at saturated conditions, where a 50.8 × 127 mm2 heater is attached to the aluminum plate. The effects of particle size, coating thickness, and fluid properties on the evaporation performance are evaluated. The temperature distribution across the entire surface is found to remain uniform with nearly zero superheat until the dryout heat flux occurs. A theoretical model is developed to predict the dryout heat flux based on pressure drop through the microporous layer, and the experimental results are in good agreement with the theoretical model.