Misting nozzles function in cooling by atomizing pressurized water into aerosol particles that “flash-evaporate”. The smaller the water droplets, the better the cooling. We typically suggest using the .012″ nozzle orifice in dry climates and the .008″ nozzles for humid climates. Clogged nozzles that have calcium build up can be cleaned by soaking them in our nozzle cleaner. Let them soak for 30 min to one hour, rinse them and re-install them in the system. Our water mister nozzle series come apart for easy cleaning and flushing of debris. Adding a Scaling filter to the misting pump will assist in the reduction of calcium build up. Our standard nozzle thread is 10/24. The misting industry also accepts other thread sizes such as 12/24,