Scale build-up on coils and fill media is a common cause of deteriorated thermal performance. Many older units were supplied with spray water distribution systems consisting of many small orifice nozzles. Newer technology uses fewer nozzles with a large non-clogging orifice to give a better, more complete spray coverage that not only reduces scale, but also reduces the need for cleaning nozzles. These nozzles are available separately or in complete spray distribution kits.
Proper spray water distribution is important to the long-term efficiency of your cooling tower. A fully wetted coil or fill surface will resist scaling and dirt build-up while maintaining peak thermal efficiencies.