It is necessary to have about one canister for eTer7 200 to 250 'bushels of 

 fruit* TAese canisters, containing 1*5 pounds of carbon each, are mounted on 

 a manifold which in tium is installed in a wooden or sheet metal housing. To 

 this housing is connected an auxiliary fan vdiich drairs air through the canisters 

 and discharges clean air into the intake side of the cold diffuser* A diagram 

 of a canister and a general arrangement of the unit is shown below. 



Top view 



Arrows 



indicate 

 movement 

 of air 



Activated 

 carbon 



Activated Carbon 

 Canister 



Cold 

 diffuser 



Auxiliary 

 fan 



Side view 



Diagram of Activated Carbon Canister and 

 Arrangement Necessary for Their Installation 

 as an Air Puji.fioation Unit in an ^ple Cold 

 Storage Room. 



It is estimated that such an installation will cost {^proximately 6 cents 

 a bushel. Yearly maintenance 0.5 cents a bushel. After each season the 

 canisters are returned to the manufacturer who reactivates the carbon and puts 

 it back in the canister. 



For those who may be Interested in air-purification, more Information may 

 be obtained from the Pomology Department, University of Massachusetts, Anherst, 

 Uassachusetts. 



