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1954-55 Theatre Catalog, 12th Edition, Page 366 (328)

1954-55 Theatre Catalog, 12th Edition
1954-55 Theatre Catalog
1954-55 Theatre Catalog, 12th Edition, Page 366
Page 366

1954-55 Theatre Catalog, 12th Edition, Page 366

THIS COMPACT 50 ton Westinghouse compressor provides refrigeration lor the Adams Theatre, Dorchester, Mass. Outline on floor is where ice bunker of previous coollng system had been located.

Texas, Colorado, and Philadelphia have resulted in reduction of payroll plus a gain of door space which was put to other uses.

Do not forget that inspection and maintenance are necessary to protect your investment. The check chart illustrated will be of inestimable value to

EXTERIOR VIEW 0! the Adams Theatre. This house is typical of the many


you and will serve for most systems being installed today.

Air Distribution

There are two general classifications of air distribution in common use in modern theatres. The first is known as the vertical or downward diffusion sys on at!

which install modem

tem, and the second is the horizontal diffusion system. In the first system air is introduced through supply openings in the ceilings of the auditorium and in sofiits of mezzaninesand balconies.

The horizontal diffusion system introduces the air through side wall outlets and high velocity ejector nozzles are sometimes used to create circulation of a large volume of secondary air. This system has many advantages and a few disadvantages, The main disadvantage being that ceilings and Walls must be smooth and free from beams and ornamentation.

A variation of the above, employing supply outlets mounted in the walls 12 to 14 feet above the fioor, is rapidly becoming quite popular. This method forms an even stratification of cool air from the door to the height of the supply outlet and makes no attempt to cool the cubic volume of space between the outlet and ceiling. In many theatres such space is enormous and requires many tons of refrigeration to cool. By forced stratification to a height of 12 or 14 feet a reduction in machinery first and operating cost may be realized. Balconies and mezzanines are treated as separate spaces and air is supplied by ceiling or wall outlets.

The major difficulty to be overcome in cooling balconies is the tendency of cold air to spill over and drop into the occupied space below. This may be prevented by good engineering of outlets and returns.

Projection rooms should always be provided with a separate exhaust to the outdoors with no return to the central return system. Conditioned air may

be supplied from the central supply duct system. ACKNOWLEDGEMENT: We wish to

thank Jerry Bixby, of Typhoon Air Conditioning, Brooklyn, N. Y.; W'. B. Colt, Westinghouse Electric Corp. Air Conditioning Division; and J. L. McCarry, Chrysler Corp. Airtemp Division, for furnishing the photographs and material used in the article.

air conditioning to provide pleasant surroundings.

mam H! F E R m,2

1954-55 Theatre Catalog, 12th Edition, Page 366