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1945 Theatre Catalog, 4th Edition, Page 402 (378)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 402
Page 402

1945 Theatre Catalog, 4th Edition, Page 402

THIS SCHOOL ROOM clearly indicates how a radianhheating system eliminated bulky heating elements frequently used in conventional systems. Note that every inch of floor space is available, inasmuch as the heating

units are completely embedded in the floor slab and, consequently, out of sight.

Radiant heating gives greater

warmth with less heat because, by warming walls and floors, it prevents the loss of body heat by radiation.

is where the temperature at floor level is equal to or greater than at head level. This balance is difficult to achieve, especially in high-ceilinged theatre auditoriums.

In a radiantly heated building, the air temperature at different levels varies only slightly and the maximum temperature is at floor level. Scientific observations in a radiantheated cathedral in

SNUGGLED IN THE COAL-RIBBED HILLS of Buchanan County, Virginia, is Jewell Valley, so small and homessible (to city-dwellers) that it rarely appears even as a dot on the map. Yet to the Jewell Valley Theatre a 350-5eat house built to serve the motion-picture requirements of the employes of the Jewell Ridge Coal Corporation -- must go the credit of the first theatre in the United States to utilize radiant heating, a system earlier proved efficacious in providing plenty of heat for schools, churches, offices, and homes in coldest weather.


England disclosed that when the temperature four feet above floor level was 60 degrees, the temperature 97 feet higher was 58% degrees, only 1% degrees lower. The heating elements of a radiant heating system generally are located in the floor and these heat the tloor to a desired temperature. From the floor, heat is radiated to all other colder surfaces until they too are approximately the same temperature. Therefore, the air temperature is of little consequence in a radiant heated environment because heat radiations can pass through the air without disturbing it, or inciting currents.

The complex subject of ventilation in a theatre building is extremely important and radiant heating systems are designed so that they will function well with whatever air conditioning .units might be installed.

Space Utilization

Maximum utilization of space is any other advantage which has made radiant heating so popular, especially in areas designed to house audiences. With all heating elements completely concealed, seating arrangements are not restricted and all fioor space is available.

Dust Problem

The prevalence of dust particles in air which is being circulated by erratic currents throughout the' auditorium can be a health hazard, because these dust particles sometimes carry disease-producing or disease-carrying organisms. Radiant heating provides a sanitary and healthful atmosphere for theatre-goers, because the volume of air currents in radiant-heated areas is almost negligible and dust particles are permitted to settle out.

Dirt problems have always heckled theatre managements. Periodic cleaning or painting of walls, ceilings, iixtures and draperies represent sizeable figures in a budget. Since dirt tends to collect or precipitate on cold surfaces, walls, fixtures and ceilings having temperatures lower than the air temperature soon become coated with dirt. The principle of radiant heating is to heat the surfaces, not the air, and this is why dirt problems are lessened in radiant-heated areas. Buildings in which radiant heating has been installed have remained clean for more than seven years.

Between-Shows Cooling

In neighborhood show houses having two bills nightly it sometimes becomes a problem when the early audience exits after the first show and the doors are left open for a length of time. Warm air in the auditorium escapes very rapidly and cold air rushes inside, chilling the auditorium. When air is not the primary comfort-producing medium, as in radiant heating, the entry of cold air does not produce any discomfort to patrons if floor and wall surfaces are warm. Tests made in a radiant-heated airplane hangar revealed there was a 22-degree drop in air temperature inside when the huge doors were opened. Normal temperature was regained completely in 61/2 minutes after the doors were closed.

1945 Theatre Catalog, 4th Edition, Page 402