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1954-55 Theatre Catalog, 12th Edition, Page 374 (336)

1954-55 Theatre Catalog, 12th Edition
1954-55 Theatre Catalog
1954-55 Theatre Catalog, 12th Edition, Page 374
Page 374

1954-55 Theatre Catalog, 12th Edition, Page 374

system, a continuous tiow of cool air moves vertically toward the floor.

With the front distribution arrangement, supply air is discharged high on the front walls on both sides of the proscenium. The air moves Slowly over the audience to the return air grilles low at the rear.

The rear system uses high Velocity air diSCharge at a high level, which, moving along the ceiling to the front, creates .arearward air movement at the floor level. Return air is also taken at the rear in this circular air flow system.

The sidewall system can utilize diffusers on either one or both side walls, depending upon the size of the theatre. In the latter instance, particular care must be exercised to avoid excessive turbulence at the center of the theatre which will occur if the two air supplies overlap.

Selection of Basic Equipment

= The air conditioning industry offers a wide variety of equipment to meet the many different requirements of theatres.

Available refrigeration air conditioning plants vary from packaged air conditioners, which can be placed directly in the conditioned area, to complex builtup systems, occupying extensive equipment rooms and utilizing such devices as air washers, reheat coils and humidifiers to provide critical and continuous clontrol of all atmospheric conditions.

LIn the simplest cases,,packaged units, which are available in 2 to 15 ton sizes (one ton of cooling is the equivalent of 12,000 B. T. Ufs per hour of cooling capacity), can perform adequately.

A 30 TON preassembled central station BK unit (above) being inspected at Ritz. Albany. N. Y. Ductwork in theatre (below) is being insulated.

These units are often located in the main theatre area and contain, in attractive upright cabinets, complete refrigeration systems and blowers for air distribution. They require only connections to supply water and drain and to an electrical power source, They can be used with duct systems if a remote location is desired. Most packaged units can be equipped with heating coils for all-year operation.

Most commonly used is the central refrigeration air conditioning plant. This can be built up on the job from separate components (compressor, coil, air handling equipment, condenser, etc.) or can be obtained in compact factoryassembled units such as usAIRco uRefrigerated Kooler-aire," which con tains all of these elements, including evaporative condenser if desired, in a single casing.

The latter units, available in 3 to 60 ton models and usable in combinations for larger capacity, reduce on site-labor and eliminate extensive refrigerant and water piping runs. A 10-ton RK unit occupies only 25 square feet of floor space and a 60-ton model takes only 97 square feet. These units are installed with only three connectionseto ducts, water supply and drain, and power supply. They can also be equipped with heating coils for all-weather use.

In instances where cold well water is available, this can be used as a cooling medium, eliminating the need for mechanical refrigeration machinery. This water can be utilized either to supply an air washer, a cooling coil or a unit air conditioner (coil and fan unit).

1954-55 Theatre Catalog, 12th Edition, Page 374