A unique system that can cool and maintain a precise humidity control for a greenhouse has been developed. The new greenhouse foggers are practically maintenance free. The new technology consistently produces a droplets size that is around 4.2 microns. The consistent size allows for accurate control of humidity and cooling without causing the surfaces of the plants or other surfaces in the greenhouse to become wet. Most other methods use around 20 microns or more and are not a consistent size, thereby causing problems of surfaces becoming wet. The fogging orifice is .1″ in diameter and do not clog up like the normal smaller .006″ in diameter orifices.