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Heating Ventilating Air Conditioning Guide 1939 Specific density, 3 Specific gravity, 2, 843 of fuel gas, 182 Specific heat, 3, 843 of air, 5 mean, of water vapor, 3 of water, 31 Specific humidity, 8 Specific volume, 3, 843 of saturated steam, 31 Split phase motor, 723 Split system, 843 air conditioning equipment, 416 Steam (continued) properties of, 28 requirements of buildings, 240, 792 saturated, properties of, 31 superheated, 271, 844 supply mains, 844 tables, 8, 28 trap, 843 tunnels, 786 underground, 783 in unit heaters, 436 Sterilization of air, 618 Stokers, automatic control of, 705 central fan, 416 apartment house, 212 automatic control of, 404, 715 unit ventilators, 442 Spray, booths for painting, 658 cooling, ponds, 531 efficiency of, 530 towere, 532 distribution of, 522 generation of, 522 humidifiers, 523 type of central station system, 415 water coolers, 476 Square foot of heating surface, 843 Squirrel cage motors, 723 Stack, stacks, 384 effect, 688 height, 843 classes of, 204 combustion process, 215 adjustments, 217 efficiency, 218 commercial, 212, 213, 214 controls, 218 design of, 207 economy, 207 household, 210 mechanical, 207 operating requirements, 211 overfeed flat grate, 207 overfeed inclined grate, 208 types of, 207 underfeed, 207, 844 underfeed rear cleaning, .209 ` underfeed side cleaning, 208 size of, 386, 395, 692 wall, 386 Storage, of hot water, 814, 818 Stairways, 127 temperatures and humidities for, 640 Standards, Storm sash, 123 air, 843 Streptococcus, 49 air conditioning, 49 A.S.H.V.E. codes and standards, 254, 277, 854 for fuel oil, 1?9 for pipe, 362 for radiators, 277 for welding, 374 Static pressure, 426, 843 Steam, 843 coils, 493 condensing rates, 273 . , consumption for buildings, 246_ flow, Babcock's formula, 308' heat content of, 23 ------ - - heating systems, 281, 843 air-vent, 282, 285, 315, 818 atmospheric, 291, 295,. 328 classification, 281 condensation return`pumps, 299 , connections, (see Connections, Fittings) Stroke, heat, 617. Sub-atmospheric systems, (see also Steam. Heat ing Systems) Suction, static in exhaust systems, 653 Summer, care of heating boilers, 267 comfort zone, 62, 64 conditioning, apparatus for, 415,' 448, 517 desirable indoor conditions in, 64 temperatures, 146 wind velocities and directions, 146 / Sun, effect on heating requirements, 298 . factor of cooling load, 149 . Supply outlets, selection of, 387 types of, 395 corrosion of, 380 design of, 281, 307 Surface, - conductance, 844- dirt pockets, 334 district heating, 781 dripping of, 333 . , . cooling, 493 equipment, 493 air conditioning, 415- electric, 761 equivalent length of run, 312 ratings, 493 extended, gravity-indirect heating systems, gravity systems, 275 one-pipe, 275, 285, 315, 328-' two-pipe, 285/ 318, 328. with high-pressure steam, 323 mechanical, 281 .................. orifice, 297, 310, 319, 328 pipe, 307, (see also Pipe) capacity, 314, 315 sizes, 310, 315 sub-atmospheric, 295, 302, 319, 328 . types of, 281 vacuum, 293, 300, 302, 319, 846 279 heating, 844 Square foot of, 843 radiant heating, 775 Sweating of pipe, 750 Swimming pool, 820 Symbols, .. for drawings, 851 for heat transmission formulae, 87 Synchronous motor, 727- Systems of control, 702 . `' vapor, 328, 845 one-pipe, 287, 841 two-pipe, 287, 289, 819, 844 water hammer in, 310 T zone control, 298 high pressure, 323 jet apparatus, 471 meters for, 790 pressure, 323 Tank, tanks, for domestic water supply, 814, 818 expansion, 355 flush, 806 ll xxu a a g jig a r o m i'ir w ;Ti8>8 Alphabetical Index .to Technical Data Section Tees, dimensions of, 373 Temperature, absolute, 835 of air leaving outlets, 42 lr 422, 567 apparatus sensitive to, 700 atmospheric, 190 base, for degree-day, 239, 240 basic, 3 body, 51, 52, 770 changes, effect on human beings, 53 of chimney gases, 190 in cities, 136, 146, 242 of city water main, maximum, 526 control of, 218, 225, 229. 700, 766 railway air conditioning, 631 - of cooling water, 476 dew-point, 3, 838 difference, between floor and ceiling, 134, 435 in stacks and leaders, 384, 691 dry-bulb, 2. 66, 838 maximum design, 146 specified in winter, 132 for drying, 670 effect on moisture regain, 640 effective, 56, 66, 133, 145, 838 chart, 56, 58, 69, 60, 62 for maximum-comfort, 62 ' optimum, 60 scale, 57 of gas flame, 182 in industrial processing, 740, 741- inside, 61, 62, 132 low, insulation for, 741 mean radiant, 770i 774 measurement of, 825 in occupied space, 66 outside, 134, 146 range of cooling equipment, 529 records of cities, 136, 146 at registers, 667 room, 10, 132 sensations, 55 surface, of man, 771 mean interior, 774 : systems for control of, 218, 225, 229, 699, 766 thermo-equivalent conditions, 57 water main, maximum, 626 of well Water, 524 wet-bulb, 2, 11, 830, 845 average, 529 ' design, 145, 529 as index of air distribution, 70 - maximum, 529 Terminology, 836 Test codes, 254 Test instruments, 823' -- Test methods, 823 - . Textile, textiles, fibers, regain of.moisture, 639 temperatures and humidities for processing, 641 Theaters, temperatures of, 65, 132 Therm, 844 Thermal resistance, 844 Thermal resistivity, 844 Thermocouples, 826 Thermodynamics, 844 of air conditioning, 1 . laws of, 841 Thermo-equivalent conditions, 57 Thermocouple, 825 Thermometer, 825, 826, 827 Thermopile, 826 Thermostat, thermostats, 699, 844 differential, 10, 699 with gas-fired furnaces, 229 immersion, 700 insertion, 700 location of, 405 with oil-burners, 225 pilot, 706 Thermostat (continued) with radiant heaters, 766 room, 700 surface, 700 types of, 700 Time lag, 153 Tobacco smoke, 68 Ton of refrigeration, 469, 844 Ton-day of refrigeration, 844 Total heat, 844 Total pressure, 844 Towers, cooling, 476, 513, 532, 533 Traps, with steam heating systems, 803 types of, 303 Tube, Bourdon, 824 Pitot, 827 shell and tube heat exchanger, 477 Tuberculosis, 81, 625 Tubing, copper or brass, 371 Tunnels, for steam pipe, 786 Turbines, with unit heaters, 440 Two-pipe steam heating systems, Steam Heating Systems) Two position controls, 702 Typhosus, 50 (see also U Ultra-violet light, 73, 82 Underfeed distribution system, 844 Underfeed stoker, 844 Underground piping, 783 Underwriters' loop, 322 Unit air conditioners, 431; 448, 844 Unit coolers, 431, 445 Unit equipment, 431 Unit heaters, 433, 759, 844 Unit ventilators, 431, 441, 844 Unwin pressure drop formula, 782 Up-feed piping systems, 845, (see also Steam Heating Systems) V Vacuum gage, 824 Vacuum pumps, 293 ", Vacuum refrigeration, 471. control of, 717 Vacuum system of steam heating, (see also . Steam Heating .Systevns) Valve, valves, 376 ' 'T` apparatus which operates, 699 on boilers, 264, -321 - - -- ............. connections for, 786 control, 326 with steam heating systems,- 326, 876 with high pressure steam, 323 pressure-reducing, 324, 786 ratings of, 323 -for radiators, 384 relief, 356 roughing-in dimensions, 379' solenoid, 701 sub-atmospheric system, 295. types of, 376 for water supply, 804 Velocity, 845 air, in ducts of buildings,'407, 687, 597 in exhaust systems, 653, '660 chimney gas, 193 draft loss, 198 contours, 655 in ducts, 407, 653, 660, 827 of fans, 557 head, of fluids, 581 XXlll