Document 37obdYx4NpMG9oGjbYj43jRn

Heating Ventilating Air Conditioning Guide 1939 great. The charts do not apply to rooms heated by radiant method such as British panel system, open coal fires and similar usages. They will probably not apply to races other than the white or perhaps to inhabitants of other countries where the living conditions, climate, heating methods, and clothing are materially different than those of the subjects employed in experiments at the Research Laboratory. Chapter 3. Physical & Physiological Principles of Air Conditioning passing back and forth from a small experimental room having three cold walls, to a control room with walls and air at the same temperature. It can be seen in Fig. 5 that with air and walls at 70 F in the control (warm wall room), the cooling effect of three cold walls at 55 F ofgthe experimental room was 4 F. Therefore, for the same feeling of warmth, In rooms in which the average wall surface temperature is considerably below or above air temperature, a correction must be applied to the readings of the dry-bulb thermometer to allow for such negative oc positive radiation. In Fig. 5 is given the cooling effect of cold walls.as determined at the A.S.H.V.E. Research Laboratory23 by trained subjects -A.S.H.V.E. Research Report No. 946-Cold Walls and Their Relation to the Filing of Warmth, - by F. C. Houghten and Paul McDermott (A.S.H.V.E. Transactions, VoL 39, 1933, p. 83). 58 a the temperature in the experimental room should: be increased to 74 F. The reverse would hold in rooms with" high-wall surface temperature: a lower air temperature would be required to compensate for positive radiations to the occupants. 59