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 slight motion of the air from an external source. Opening a door at one end of the warehouse room, although, as before stated, these doors did not open outdoors, made a decided difference, and if a strong wind was blowing outside, the radiator to the windward side had some advantage, although no draft would be perceptible. However, with due care, the two tests for each comparison were made to check with fair accuracy.

Steam Heating and Ventilation - Figure 23.png

23 Front Elevation of Testing Rooms.

Steam Heating and Ventilation - Figure 24.png

24 Plan of Testing Rooms.

Steam Heating and Ventilation - Figure 25.png

25 Elevation of Piping. Radiator Tests.