DATABASE:EAP *** Reference number- 441 :N0 350405.001 :TL Ammended Report of Chief Inspector of Factories * incidence of fibrosis; use of materials at factories; provisions in factories shop act; steps which should be undertaken.

Heating Ventilating Air Conditioning Guide 1938 Vent, vents, on traps, 296 in unit ventilators, 446 Ventilation, 51, 669, 830, (see also Air Dis tribution) of bams, 679 in drying, 661 of garages, 680 in hospitals, 598, 602 mechanical, 77 with roof ventilators, 672 natural, 77 air changes per hour, 127 control of, 673 general rules for, 677 heat to be removed by, 675 openings, doors, 671 formula to determine size of, 669 location of, 675 skylights, 671 types of, 670 windows, 671 for public buildings, 70, 575 purpose of, 675 quantity of air necessary for, 70 railway air conditioning, 609 by registers. 673 for schools, 70 by stacks, 670, 673 symbols. 836 Ventilator, ventilators, resistance of, 672 roof, 672, 827 unit, 235, (see also Unit Ventilators) Venturi chimney, 180 Vibration of machine mountings. 587 Vitiation of air, 51 Volume,. of air and saturated vapor, 12 conversion equations, 834 furnace, 824 specific, 3 of saturated steam, 28 of water, 27 W-Z Wall, walls, absorption of heat, 155 air leakage through, 122 of chimneys, 195 condensation on, 141 fire, 640 heat transmission coefficients for, 89, 90, 97, 104, 106, 108 . radiators, output, 264 solar radiation on, 152, 153 time lag through, 155 Warm air heating systems, 830 gas-fired furnaces for, 222 gravity, 377 mechanical, 393 Washers, air, 396, 499,. 524, 525. 820 Water, boiling point of, 27 > circulating, temperature of, 512, 724 from city mains, 482, 508 cooling, equipment, 507 quantity, 509 temperature. 506, 508 . composition of, 27 demand, 785, 804 density of, 27 domestic supply, 783, 797 evaporation of, 516 factor of usage, 785, 804 flow from fixtures, 784, 785 freezing, 733 friction losses through pipes, 791 hammer, 303 heaters, 411, 799 heating, 783 Water (continued) hot, domestic supply, 783, 797 boilers, 799 demand for, 803 electric heating of, 747 pipe sizes for, 798 storage of, 798, 802 beating systems, 331, (see also Hot Water Heat ing Systems) inches of water, 825 line, in boilers, 258, 259, 275 in water supply systems, 790 make-up, 516 meters, disc, 789 pans, for humidification, 403 pipe, 787 pressures, 27 probable usage, 785, 804 properties of, 27 as a refrigerant, 37, 45 replacement of, 516 supply piping, 783 down-feed systems, 786 mains, 790 up-feed systems, 788 temperature, maximum main, 508 from wells, 506 thermal properties of, 27 vapor, 5, 10, 12 given off in combustion of gas, 175 heat content, 12, 23 mean specific heat of, 3 weight of saturated, 12 Weatherstripping, 126 Weight, of air, 6 conversion equations, 834 of steam, 28 of vapor, 12 of water, 27 Welding, 355, 366 neck flanges, 371, 372 Well water refrigeration control of, 702 Well water temperature, 506 Wet-bulb temperature, (see Temperature, Wet-bulb) Wet return, 830 Wind, in cities, 138, 148 effect on heating requirements, 137 forces in natural ventilation, 121, 669, 675 prevailing, direction of, 127, 148 records of velocity and direction, 138, 148 velocity on natural draft equipment, 515 average, 127, 137, 148, 669 equivalent, in tall buildings, 128 used in calculations, 127 Window, windows, 671, 673 air leakage through, 124, 126 clearance of sash, 125 coefficients of transmission of, 117 comparison of various shades for, 156 crack, 124 measurement of, 124 solar radiation through, 152 storm sash, 125 Winter, comfort zone, 63, 64 conditioning, apparatus for, 393, 409 cooling in, 147 humidification in, 63, 68, 403 inside temperature, 134 . relative humidity in, 68 temperatures, 138 wind velocities and directions, 138 Zero, absolute, 819 Zone, zoning, for air conditioning systems, 428 automatic control, 6S8 comfort, 63, 64, 66, 821 control of steam heating systems, 291 for large heating systems, 351 . neutral, 826 water supply systems, 783 Heating Ventilating Air Conditioning AIR, WATER AND STEAM Dalton's Law, Temperatures, Air Properties, Humidity, Rela tive Humidity, Specific Humidity, Relation of Dew Point to Relative Humidity, Adiabatic Saturation of Air, Total Heat and Heat Content, Enthalpy, Psychrometric Chart, Properties of Water, Properties of Steam, Rate of Evaporation AIR conditioning has for its objective the supplying and maintaining, in a room or other enclosure, of an atmosphere having a composition, temperature, humidity, and motion which will produce desired effects upon the occupants of the room or upon materials stored or handled in it.

Heating Ventilating Air Conditioning Guide 1938 Sun Effect Through Windows Windows present a problem somewhat different from that of opaque walls, because they permit a large percentage of the solar energy to pass through undiminished; only a small percentage (approximately 10 per cent) is reflected.

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Heating Ventilating Air Conditioning Guide 1939 Chapter 12.

s -r-`7ey *> Heating Ventilating Air Conditioning Guide 1939 pump withdraws the air and water from the system, separates the a' from the water and expells it to atmosphere and pumps the water back / the boiler, or other receiver, which may be a feed-water heater or hot well.

Heating Ventilating Air Conditioning Guide 1939 are other forms of distributors the above are typical examples.

Heating Ventilating Air Conditioning Guide 1939 Table 2.

Heating Ventilating Air Conditioning Guide 1939 aV- J. **?

Heating Ventilating Air Conditioning Guide 1939 tion of the day switch and entirely cut off the supply of steam to the radiation at night during certain hours which are selected by the operating engineer.

Heating Ventilating Air Conditioning Guide 1939 One-Pipe System {steam): A steam heating system consisting of a main circuit in which the steam and condensate-flow in the same pipe, usually in opposite directions; Ordinarily to each, heating unit there is but one connection which must serve as both the supply and the return, although separate supply and return connections may be used.

/ Publications American Artisan Published by KEENEY PUBLISHING COMPANY 6 North Michigan Avenue, Chicago, III. ___ \ American ARTISAN, now in its 61st year of publication, covers the field of warm air heat ing, residential air con ditioning, and sheet metal contracting.

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Table 2.

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