cooled condenser would be justifiable. It should be remembered that air cooled 

 condensers usually are accomplished by higher condensing temperatures which in 

 turn result in less efficiency from the compressor. 



Insulation - (Refer to Fig. 1) Established practice has called for the 

 use of 4" of cork or its equivalent (U s .075) in the walls, 2" of cork or its 

 equivalent (U z .15) in the floor, and 6" of cork or its equivalent (U s .05) 

 in the ceiling. Less insulation means the heat transmission through the build- 

 ing from the outside will be greater and refrigeration requirement will then be 

 higher. 



Vapor Barriers - (Refer to Fig. 1) On the walls, adequate vapor barriers 

 (less than 1 gr. of moisture per square foot per hour) should be placed on the 

 outside face of the insulation. This will keep moisture from condensing on 

 the cold face of the insulation since it will not be able to penetrate through 

 the vapor barrier on all sides. Ceiling insulation on gable roof storage 

 construction calls for a vapor barrier on the underside of the insulation. 

 The top side requires no vapor barrier provided the space above the insulation 

 is vented. 



Gas Seal - (refer to Fig.l) Various materials have been used as gas seals 

 satisfactorily. On the walls and ceiling, the gas seal is placed on the inner 

 face of the insulation. If the material used for the seal requires support, 

 this must be properly anchored through the insulation, to the storage walls. In 

 the floor, the seal is placed over the insulation and under the floor wearing 

 surface. 



Special C. A. Equipment - To complete the equipment necessary to operate 

 a C. A. storage, a carbon dioxide scrubber, a breather bag, an Orsat analyzer, 

 and an air purifier must be provided. 



If the above components are properly planned and good workmanship and 

 materials used in the construction, your C. A. storage will give you years of 

 satisfactory service. 



J. W. Zahradnik 



I I I I I I I I I I I I I I I I 



DATES WORTH NOTING 



J""e 17 - Annual Strawberry Twilight Meeting at the University of Massachusetts 

 7:00 P.M. 



July 18 - Summer Meeting Massachusetts Fruit Growers' Association, Rice Fruit 

 Farm, Wilbraham - all day. 



