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1945 Theatre Catalog, 4th Edition, Page 401 (377)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 401
Page 401

1945 Theatre Catalog, 4th Edition, Page 401

Comparative Costs

,.Installation costs have steadily declined throughout the years due to engineering and fabrication improvements. In most communities radiant heating systems need not cost any more than any other good heating system.


The primary objective of any heating 1 system is to provide and maintain healthful and comfortable conditions in enclosed structures during cold seasons. This is indeed essential in theatres. A great deal of research has been conducted to determine just what constitutes ideal conditions of comfort.

In most systems, hot water is forced through the pipes. and circulated back to the boiler for reheating. Water temperatures in a radiant heating system are much lower than in conventional systems because the latter depend upon small heating surfaces with high temperatures to heat an area while radiant heating involves large surfaces with low temperature. Because lower temperatures are required, there is greater fuel economy. Savings up to 30 per cent may be anticipated in a. radiant heating. system. There also is the possibility of reducing the size of the boiler due to the lower temperature requisites.

Stratification of Air i

One of the major problems in heating a theatre auditorium is the necessity for uniform distribution of heat throughout the entire area. What theatre manager has not heard'complaints from patrons seated, near radiators or registers that they are uncomfortable because of the excessive heat? And, likewise, complaints from patrons farther away from the heating units that they are too cold?

Naturally, to furnish enough heat for those patrons in the center of the theatre it is necessary to increase the temperature of the heating units. When this is

EMBEDDING THE RADIANT-HEATING SYSTEM GRIDlRON in concrete to form the floor slab is shown in this photograph. Obiect of this unique heating system is to warm the floor surfaces to a comfortable temperature to compensate for the body's normal heat losses through radiation without causing stuffy atmospheric conditions.



THE lNClINED FLOOR OF A THEATRE AUDITORIUM is no bar to radiantvheaiing installations, as indicated by this picture of the coil system in the floor of the Jewell Valley Theatre, Jewell Valley, Virginia. Hot water, circulating through the coils from a conventional boiler, warms the concrete floor. Such coils are generally installed on a slight pitch to facilitate gravity drainage of the system when the need for heating is no longer present.

done, the patrons nearest the units become too hot.

By controlling the temperature of wall, floor, and ceiling surfaces which abstract the normal body heat, it is possible to provide equal comfort for all patrons, regardless of where they may be seated.

Warm air rises to the ceiling and temporarily remains there, losing a certain amount of its heat value to the colder surfaces of the ceiling. , Should there be any openings in the ceiling, the warm air will escape. As additional warm air

rises, that remaining at ceiling level gradually is forced downward.

During the descent, a series of layers of air, each at a different temperature, is built up. This results in warm strata of air at some levels and colder strata at others. It is this uneven distribution which causes discomfort-stuffiness at head level and an annoying chill at foot level, or vice versa.

Cold drafts which sweep along the floor of an auditorium also cause uncomfortable conditions. The ideal situation

SMOOTHING THE CONCRETE SLAB for flooring over a network of pipes for a radiant heating system is shown here. One of the advantages of this system is that heating facilities can be installed immediately after the foundation, and put into operation to provide comfortable interior working conditions during Cold weather.
1945 Theatre Catalog, 4th Edition, Page 401