> > > >

1947-48 Theatre Catalog, 6th Edition, Page 404 (390)

1947-48 Theatre Catalog, 6th Edition
1947-48 Theatre Catalog
1947-48 Theatre Catalog, 6th Edition, Page 404
Page 404

1947-48 Theatre Catalog, 6th Edition, Page 404

The Packaged Air Conditioner for Theatres

Units Engineered for Unattended Operation

Adapted to Utilization in Smaller Cinemas

Fundamentally there are but two methods in popular use for air conditioning a theatre: the centralized system and the tipackaged" air conditioners.

Centralized System

The use of centralized systems, employing built-up or tailor-made apparatus and a single large refrigeration compressor, is generally utilized in theatres of 1,000 seats or more.

In this system adequate space for a machine room must be provided, as Well as space for a trunk supply-air duct and return-air duct. Overhead distribution of conditioned air is generally employed, with the air introduced to the space by means of decorative ceiling plaques or circular pre-fabricated metal ceiling outlets.

A system of returns from the front or rear or from "mushroomsl, under the seats is utilized to return the air to the central air conditioner. Positive introduction of outside air through the conditioner for ventilation purposes is always provided.

Heating is usually accomplished through the same system with the prime source of heat being a steam boiler or community steam.

Figure 1 illustrates the schematic arrangement of the conditioner and supply and return ducts of a large central system. Figure 2 shows a large refrig FIGURE l-The schematic arrangement of the conditioner and the supply and return ducts of at large central system. From the conditioned space, the returned air is mixed with the proper percentage of outside air, and the mixture is passed. through the filters, and thence past the cooling and


Jirlemp Division, Chrysler Corporalion

eration machine which would furnish refrigeration for such a central system.

"Packaged" Air Conditioners

The other method of air-conditioning, which is particularly adaptable to smaller theatres, such as neighborhood houses, employs self-contained npackaged" air conditioners ranging in size from 3 through 25 hp.

These packaged air conditioners contain all of the functional parts of the centralized syst:m in one pine-assembled unit. Only utility connections, a source of steam or hot water, and short air distribution and return systems need be attached to complete an installation.

The air-conditioning layout using packaged air conditioners for a 350-seat theatre is shown in Figure 3. It will be noted that very short supply ducts were required in this case, as space was available for the units adjacent to the conditioned area and the location of the units provided a good air pattern in the theatre.

Figure 4 illustrates the application of several packaged air conditioners to a house seating 828 persons. In this case space was available for the units at each side of the stage. Supply duct work from

P: Mar/6:; 153'

TAIL-'3 M05747

Vs its $3: V35 g \ .Qs Q '\ \w: \Sw are is gas: :95 was COND/F/O/VED SPACE



I 4/ lap/on Ger/ass

'{s m

the units was run at the ceiling on both sides of the house. The foyer was conditioned by a package unit supplying air through ceiling outlets.


There are many considerations to be taken into account when calculating a theatre air-conditioning load.

From a load standpoint, theatres can be divided into two groups. The first group can be called the ttimportant maximum day-time load" theatres. These are usually the downtown theatres of the larger cities, and are the theatres that have a record or a good prospect of many capacity audiences during summer afternoons. This cooling for these theatres must be figured at the maximum daytime conditions. .

The second group of theatres can be called tithe evening peak load classfy These theatres do not have important summer daytime capacity audiences and hence, their maximum load occurs during the evening hours when the outside wet bulb is below maximum in most 10calities. This second group of theatres may have Saturday afternoon childrenls matinees which are well attended but the management can usually discount the discrimination of this audience with regard to comfort. In many localities it has been established that summer Sun dehumidifyinq coil (or, when it is to be used, depending, of course, on what is desired, the heating coil). After passing the spray humidifier, the conditioned air is, by a blower or fan, delivered to the supply duct. through which it passes to the various air outlets in the auditorium and other areas.

0075/05 ill/e


0075/05 AM) 85 mew .4 I:

( 001 ms AND 05 l/(lM/D/FY/IYG (b/L .

(v1.3.4 3%....9 L'JZM'J

[117.535 f



@oI/Nclfso/z/M, M" lam/VG lira/UM "00f"

.nl Illllllllllllllllll'mllllllllllla

1/547/M5M50/r/M,"//v" l/ur/m; (2m.



1947-48 Theatre Catalog, 6th Edition, Page 404