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1947-48 Theatre Catalog, 6th Edition, Page 410 (396)

1947-48 Theatre Catalog, 6th Edition
1947-48 Theatre Catalog
1947-48 Theatre Catalog, 6th Edition, Page 410
Page 410


1947-48 Theatre Catalog, 6th Edition, Page 410

AVERAGE DRY-BULB TEMPERATURES in the United States, calculated as a basis for estimating the cooling requirements of theatres. This map. and its figures, should be used in conjunction with the adjacent map that shows comparable averages for wet-bulb temperatures throughout the country.

central-plant system and the extra expense encountered.

Table l is an approximation of the tonnage required in theatres for different sections of the United States, based on average dry- and wet-bulb tempera. tures.

Type of construction, insulation, and orientation will, of course, influence the size of unit required. The very nature of a fully occupied theatre produces a high latent heat and to dissipate this requires units equipped with over-size cooling coils. It is important, therefore, that units be selected with cooling coils of full face area and five to seven rows deep.

Where water is scarce or expensive, cooling towers should be used for water conservation and economy. However, here, too, units should be selected with special three-pass condensers for 'more efficiency and capacity, units with standard condensers are designed for city



water supply and cannot do the same job for use with cooling towers. Self-contained units are especially adapted to small theatres and locations favored at the stage end and entrance end. However, they are not limited to

TABLE le-Seats per ton of refrigeration for various design conditions. (These figures can be modified somewhat for cases where the maximum occupancy takes place during the evening when the fresh-air load and transmission load is small.)

Seats per ton,









W'et bulb with dry bull) ate (a F.) 90o F. 950 F. 1000 1-: 65 25 24 23 70 24 22 22 73 22 21 21 75 21 20 20 78 20 19 18 Roe: 2- n - l













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AVERAGE WET-BULB TEMPERATURES in the United States, calculated as a basis for estimating the cooling requirements of theatres. This map, and its figures, should be used in coniunction with the adjacent map that shows comparable averages tor dry-bulb temperatures throughout the country.

small theatres. In several large theatres, as many as twelve units have been recommended with certain good results and at lower cost, plus the added feature of zone control.

Theatre owners should also have in mind a maximum risk of central plant being shut down for want of replacement of a critical defective part, as experienced during the war period, versus the minimum risk of all the self-containeds being out of commission at the same time.

It must be agreed that self-contained

units can be moved from one theatre to another, without such loss encountered when removing a central system. , Winter heating with the self-contained units is accomplished by simple connections to factory heating coils. This feature eliminates the necessity of unsightly wall radiation or any direct radiation in the theatre, other than that required for toilets, lobby, or stage.

SUGGESTED ARRANGEMENT of Typhoon selfcontained units in a typical one-floor theatre to provide satistactory air-conditioning. The upper lett drawing shows this typical theatre in longitudinal section, with the orchestra plan shown at the lower left. Immediately below is shown the transverse section. In this layout three units are used: one at either side of the screen and the third at the rear right of the auditorium. In the unit set-up, one, two, or three may be operated as the conditions demand. The sell-contained units are suited for air-conditioning and heating the small and Quonset theatres with seating capacities up to 600 seats. The same units cool, filter, dehumidity, and circulate the air in summer, and heat in winter. The large coils, condensers, and other over-size parts are built to give service at their tull'rated capacity.

THEATRE CATALOG 1947-48

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1947-48 Theatre Catalog, 6th Edition, Page 410