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1954-55 Theatre Catalog, 12th Edition, Page 367 (329)

1954-55 Theatre Catalog, 12th Edition
1954-55 Theatre Catalog
1954-55 Theatre Catalog, 12th Edition, Page 367
Page 367

1954-55 Theatre Catalog, 12th Edition, Page 367

Theatre Heating and tooling Systems

Valuable Information About the Operation and Maintenance of Heating and Cooling Systems in Motion Picture Theatres

BRIEF: Although the two seem to be at opposite poles and purposes . . . the problem of heating a theatre is linked with the cooling of that theatre . . . It is the purpose of this article to discuss some of the major considerations involved in the proper functioning of the various types of heating and cooling systems which have an application in the motion picture theatre.

There are portions of this article (19> voted to information about the various kinds of methods available . . . what the principle functions and goals of properly constructed and operated heating plants should be . . . as well as much data which should prove to be a valuable addition to the exhibitoris basic knowledge about this vital part of his theatre.

Any consideration of the subject of theatre heating must automatically include its corollaryncooling*since our one system is called upon to perform both functions in providing year-round comfort for patrons.

The classical way to both heat and cool a theatre auditorium is with a fan

THE BQHER room and controls (or a modem theatre heating plant. The system 1.3 so automatic that the human element is virtually ruled out.



Plumbing and floating Industries Bureau.

and blower system. When heat is required, the blower circulates warm air downward through duct openings in the auditorium ceiling. An automatically fired boiler is the source of heat for a heat exchanger coil used to warm the air.

When cooling is required, the blower sends air chilled by refrigeration equipment through the duct system and into the auditorium. For areas such as offices in the theatre building, projection booths, washrooms, and the boxomce, heat is supplied by conventional heat distributors for a boiler heating systemradiators or convectors, as a general rule.

Sometimes a booster coil and blower are placed across the front entrance doors to eliminate lobby drafts that more often than not are felt by those sitting in rear rows of the auditorium.

Acid Test

The acid test of a well-designed theatre heating and cooling system is imposed by the need for ventilation. There

must be frequent and complete change: of air without causing drafts.

A commonly-used type of return air outlet when air is introduced into the auditorium from above, is the mushroom head ventilator, placed at regular intervals on the floor beneath seats.

Some theatres are heated and cooled with air introduced at the ceiling and beneath the balcony. The return air is removed by grilles at the rear of the main Hoor and from an exhaust plenum below the balcony seats.

Individual Areas

Certain rooms in a theatre building require more ventilation than others, because of the accumulation of undesirable odors and fumes. In such cases, the air obviously is not recirculated, but rather vented to the outside.

With theatre washrooms, it is sufficient to provide only an exhaust system, leaving windows partially open for replacement of the air supply. Many theatre rooms require no air intake, merely outlets for good ventilation. Enough fresh air enters such rooms through various

it has been found that the more automatic heating is. the better the results. Patrons are more comlorluble and management benefits from the ofhcuncv.
1954-55 Theatre Catalog, 12th Edition, Page 367