June 2012 Newsletter (vol.8)   >>   Küül Pad Lifespan

Küül Pad Photo


Temperatures are heating up at least here in the Midwest. Are they heating up in your area? If so, it is time to refresh yourself on how to maintain your Kuul pads, evaporative cooling media.


What is a Kuul Pad?

Kuul pads are made of virgin kraft paper (cellulose) and insoluble resin. They have a cross-fluted design that makes the water and air exchange more efficient. Edge coating is an option available when ordering your Kuul pads. It is available on one or two edges. The coating permits improved cleaning and prevents damage when handling.


Evaporative cooling systems work because the air is drawn through the wet kuul pad and the water is evaporated off the pad, thus removing the heat from the air.


Tips to Prolong the Life of Your Kuul Pads:

  • Keep the pads and sump tank shaded from direct sunlight. Algae will grow on any surface that is wet and exposed to direct sunlight.
  • Have a lid on the sump tank at all times and clean it bi-weekly.
  • Clean water filters weekly.
  • Dry the pads at least once every 24 hours. This will kill any algae spores left on the pad.
  • Avoid or minimize on/off wetting cycles.
  • Completely flush the system every 4-6 weeks during the operating season.
  • Maintain the water at a pH level between 6 to 8. Exceeding these limits will diminish the resin on the pads and lessen the structural integrity.
  • Use a daily water bleed off rate of 3-5%.
  • Increase the amount of water flowing over the face of pads so mineral build up does not have a chance to accumulate.
  • Remove and brush pads with a soft bristled brush every 4-6 weeks during the operating season.
  • Use an algaecide. See the below list of approved chemicals.
  • Do not use chlorine at levels that exceed 1 ppm.


Approved Chemicals for Kuul Pads:

Quaternary amine, Ammonium chloride, Sodium hydrogen sulfate, Alkyl dimenthyl benzyl ammonium chloride, Ethylbenzyl ammonium chloride


Chemicals NOT Recommended for use with Kuul Pads:

Chlorine dioxide, Sodium hypochlorite, Calcium hypochlorite, Hydrantion (bromine), Sodium chlorite, Hydrogen peroxide, Hydrogen dioxide, Sodium hydroxide, Hydrochloric of Sulfuric acids.