Cleaning Evaporative Coolers

By MWI Animal Health

For evaporative pad cleaning

  • Wet pad thoroughly using a house washer or water hose
  • Do not use too high of pressure or it will harm the pad
  • Create a 4% solution of Cool-N-Klean by mixing 5 oz per gallon of water into a backpack/pump-up sprayer
  • Spray mixture thoroughly onto entire length of pad and let stand for at least 1 hour
  • Then spray the pad with clear, clean water from top to bottom, removing all minerals deposits and algae
  • To control the growth of algae, add 1 to 2 ounces of SCI-62® once per week, or after each flush of the sump

For recirculating systems

  • Remove screen/cartridge from filter
  • Add ½ ounce of Cool-N-Klean per gallon of water to the system storage tank
  • Turn pump on continuous flow until pad is completely wet
  • Run for at least one hour or until calcium and deposits are broken down. Treatment should not exceed 24 hours.
  • Using clear water, rinse pad thoroughly from top to bottom, with a low pressure hose.
  • All mineral deposits and algae should be broken down and removed during this process
  • Drain all water from the system and refill with clear, clean water.
  • To control the growth of algae, add 1 to 2 ounces of SCI-62® to the storage tank at the start of the season and 1 to 2 ounces once per week during periods of use and after flushing the sump
Evaporative cooler
051339  Cool-N-Klean  1 gal 
056643 SCI-62 Algaecide  1 gal 


To extend the longevity and productivity of the pads, these cleaning procedures should be done once in the Fall and again in the Spring before Summer usage


Winterizing Cool Cell Systems
  • Shut off the water supply and drain all water from the system
  • Disconnect any hoses and fittings
  • Remove the pump from the reservoir
  • Remove any sediment and debris from the reservoir
  • Follow all other manufacturers recommendations