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HEATINC VENTILATING AIR CONDITIONING GUIDE 1940 HEAT TRANSFER COEFFICIENTS The symbols representing the various coefficients of heat transmission and their definitions are as follows: V = thermal transmittance or over-all coefficient of heat transmission; the amount of heat expressed in Btu transmitted in one hour per square foot of the wall, floor, roof or ceiling for a difference in temperature of 1 deg F between the air on the inside and that on the outside of the wall, floor, roof or ceiling. k -- thermal conductivity; the amount of heat expressed in Btu transmitted in one hour through 1 sq ft of a homogeneous material 1 in. thick for a difference in temperature of 1 deg F between the two surfaces of the material.

HEATING VENTILATINC AIR CONDITIONING GUIDE 1940 4.

HEATINC VENTILATINC AIR CONDITIONING GUIDE 1940 V also employ copper tubing extensively.

HEATING VENTILATING AIR CONDITIONING GUIDE 1940 duals who react abnormally to' the offending substance.

HEATING VENTILATING AIR CONDITIONING GUIDE 1940 capacity and heat conductance of the jacket, it is more difficult to obtain the true temperature at a point with these than with the exposed etched stem type.

HEATING VENTILATING AIR CONDITIONING GUIDE 1941 In spite of the rapid advances in the field of air conditioning during the past few years, the secret of reproducing indoor atmospheres of as stimulating qualities as those existing outdoors under ideal weather conditions, has not as yet been found.

HEATING VENTILATING AIR CONDITIONING GUIDE 1941 Table 1.

7 HEATINC VENTILATING AIR CONDITIONING CUIDE 1941 A numerical integration (Table 4) is employed to determine the Number of Transfer Units (NTU) required.

HEATING VENTILATING AIR CONDITIONING GUIDE 1941 mostat must be removed, or protected from damage, in sub-freezing weather.

HEATINC VENTILATING AIR CONDITIONING GUIDE 1941 Manning, Maxwell & Moore, Inc., L.

r. r- "Rtf, feT-Z.S Copyright 194a BY THE American Society of Heating and Ventilating Engineers and by it Dedicated To the Advancement of The Profession and Its Allied Industries TEXT AND ILLUSTRATIONS ARE FULLY PRO TECTED BY COPYRICHT AND NOTHING THAT APPEARS MAY BE REPRINTED EITHER WHOLLY OR IN PART WITHOUT SPECIAL PERMISSION.

HEATINC VENTILATING AIR CONDITIONING GUIDE 1942 gas passages must not be so small as to cause excessive resistance to the flow of gases where natural draft is employed.

HEATING VENTILATING AIR CONDITIONING GUIDE 1942 puffs of air which may strike a person momentarily, is a function of the room temperature as well as the velocity of the air.