The new 7 piece all stainless steel .006  to .018 is here.

On a hot and sunny day, the moisture content in the atmosphere remains virtually constant; this means that the relative humidity is always lowest at the day’s highest temperature. The lower the relative humidity, the better the evaporative cooling effect is. In other words, the cooling effect is best when you need it most.

The evaporation of 1kg of water provides the same cooing effect as the melting of 7kg of ice. This is Mother Nature’s way of cooling air. Natural Fog nozzles efficiently convert ordinary water into billions of micron-sized water droplets.

When operated at 1000 PSI or higher pressure, H2O nozzles by NanoTech generate 10~15 micron water droplets which flash-evaporate when floating through the air, since rapid evaporation takes place and residence time (time required to evaporate water droplets in the air) is kept to a minimum; H2O nozzle are fully capable of achieving total evaporative cooling potential even in climates with high relative humidity.

• All nozzles were tested at 1,000 PSI using water at 70°F (21.1°C).
• The room humidity was between 40 and 50 % during the tests.
• The pattern measurements were conducted using the SETscan OP600 patternator that can measure sprays up to a maximum diameter of 7 inches.