NOTEThe Lower CarbonFilter Refill containsonly one Lower Car-bon Filter only. Thecustomer must pur-chase three (3) Low-er Carbon Filter Re-fills to service allthree (3) Lower Car-bon Filters; whichshould be servicedsimultaneouslysince they saturateat approximatelythe same rate.IMPORTANTThe timely replacement of theLower Car-bon Filters is very important. If these filtersare not exchanged when their individualweights exceed 11.8 kg (26 pounds) each,theUpper Carbon Filter will then quickly be-come saturated as a result and the user willbe forced to replace it prematurely. This isvery expensive and unnecessary. If theLow-er Carbon Filters are exchanged as directed,then theUpper Carbon Filter will last for ap-proximately 2 years use.Number present in system: 3Cleanable: NoCleaning Method(s) None, replace carbon when saturated 11.8 kgEstimated average life: 6 monthsPackage contains: 1 new Lower Carbon FilterUpper Carbon Filter (3010117951)TheUpper Carbon Filter is a large, pleated structurelocated at the top of the system designed to captureany airborne chemicals not successfully trapped bytheLower Carbon Filters. It contains 10.9 kg (24pounds) of activated carbon pellets that gradually be-come chemically saturated with use. When the totalmass of theUpper Carbon Filter has increased to 19kg (42 pounds) it must be replaced.IMPORTANTThe useful life of theUpper Carbon Filter will be extended by following therecommended service interval for the threeLower Carbon Filters. If theLow-er Carbon Filters are not replaced promptly upon reaching their specifiedmaximum weight they will over-saturate (with ink) and theUpper CarbonFilter will quickly saturate as a result.Number present in system: 1Cleanable: NoCleaning Method(s) None, replace carbon when saturated 19 kgEstimated average life: 24 monthsPackage contains: 1 filterDuster 3000FC Air Filtration System ConsumablesChapter 10 - Maintaining the Duster 3000FC Air Filtration System 199