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HEATING VENTILATINC AIR CONDITIONING GUIDE 1940 O-R Radial flow fan, 515 Radiant electric heaters. 706 Radiant gas heaters, 219 Radiant heating. 715 application methods, 718 calculation principles.' 720 measurement. 723 physical factors, 715 physiological factors. 715 Radiant temperature, 716 Radiating surface, of copper tubing, 6S8 of pipe, 688 Radiation. 49, 715, 780 black body, 721 boiler load, 247 solar, 145 Radiation pyrometers. 765, Radiator, radiators, 257, 780 A.S.H.V.E. code, 265 concealed, 262, 776 condensation rate, 261 connections, 304 correction factors, 265 direct. 777 effect of paint, 259 effect of superheated steam, 259 enclosed, 261 gas-fired, 219 gas warm air, 219 heat emission, 257 heating effect, 260 heating up, 261 output of, 258 panel. 779 recessed, 780 room temperature gradients, 260 selection, 264 tube (or tubular), 781 types of, 257 valves, 269 Rag-weed, 77 Railway air conditioning, 585 ,, air cleaning. 586 air distribution. 586 cooling equipment, 587 cost of, 592 humidity control, 588 power supply, 589 steam heating, 587 temperature control, 588 Receiver, 735 Reciprocating compressors. 431 Rectal temperature. 54 Reducing pressure valves, 344, 731 Reflective surfaces, 90 Refrigerants, 31, 780 ammonia, 32 carbon dioxide, 35 dichlorodifluoromethane, 33 feeds, 464 methyl chloride, 34 monofluorotrichloromethane, 36 water, 37 Refrigerating effect, 435 Refrigeration, 429 compression systems, 430 control of equipment, 667 mechanical, 432 characteristics of systems, 439 coefficient of performance, 435 practical cycle, 435 refrigerating effect, 435 theoretical cycle, 433 Refrigeration (continued) pipe sizes, 444 reversed cycle, 455, 712 ton,435 day of, 781 Regain, 598 of hygroscopic materials, 600 Register, registers, 529 (see Grilles) air velocity measurement, 770 dampers, 542 deflection, 536 ejector effect of, 541 for gravity furnace systems 353 ' locations, 530 for mechanical furnace systems, 367 noise, 531, 572 selection of. 540 sound control, 533 types of, 541 velocities through, 371 velocity, 548 Relative humidity, 9, 780 (see Humidity) measurement of, 772 requirements for premature infants, 71 Relays. 651 Remote air conditioning units, 415 Repulsion induction motors, 672 Research residence, 361 Residence. air conditioning control, 666 control systems. 665 heat loss examples, 137 indoor humidity for, 66 indoor temperature for, 66 noise level, 563 plumbing fixture water demand, 761 storage tank size. 756 Resistance, 86 thermometers, 765 Resistivity. 86 Resistor, 706 Respiration, 46 Restaurants, hot water consumption, 761 noise level, 563 Return, air grille, 531 boiler connections, 300 capacity, 727 Hartford connection, 300 mains, 780 pipe capacities, 296 Reversed cycle refrigeration, 455. 712 Reversed return system, 312, 780 Revolving vane anemometer, 770 Ringetmann smoke chart, 774 Roof, solar radiation, 143 ventilator, 641, 780 Room, air'conditioners. 415 control, 653 distribution factors, 534 thermostats. 650 Rotary, compressors, 431 drier, 620 oil burners, 211 Rotating ventilator, 643 S Sabins. 537 Saturated air, 5, 780 Saturating efficiency, 489 School, schools, indoor humidity for, 66 XX ALPHABETICAL INDEX TO TECHNICAL DATA SECTION Schools (continued)' indoor temperature for, 66 comfort line, 65 noise levels. 563 . plumbing fixture water demand, 761 Scrubbers. 488 Seasonal efficiency, 238 Secondary air, 162 Self-contained, - controlled systems, 652 unit, 411 Semi-anthradte, (see Cool) Sensible heat, 31, 49, 57 of water, 30 Separating traps, 284 Series wound motors, 669 Settling chambers, 512 Sheet metal gage, 613 Shunt wound motors, 669 Silica gel, 38 . systems, 451 Silicon dioxide, 38 Silicosis. 48 * Single phase motors, 672 Skylights, 113 for natural ventilation, 641 solar heat transmitted, 149 Sling psychrometer, 772 Slip ring induction motors, 676 Smith-Greenburg dust impinger, 773 Smoke. 77, 514. 780 abatement, 82 density measurement, 774 stacks, 514 Ringelmann chart, 774 tobacco, 46, 505 Smokeless arch. 780 Solar heat, 143 absorption coefficients. 148 effect of awnings, 150 intensity chart, 144 radiation factors, 147 radiation through walls, 145 through glass, 148 time tag, 148 - . transmission, 143 Solar radiation, building orientation, 68 occlusion of. 82 Solenoid valves, 651 Solid adsorbents, 37 Soot, 177 Sound, 561 ahsorber, 569 absorption, 537 control. 366. 533, 561 general problem of dbntrol,^662 level meter, 562 Specific density,*3 Specific gravity, 3, 780 of oil. 173 Specific heat, 780 of dry air, 5 Specific humidity. 8 Specific volume, 780 of air, 3 Split phase motor, 673 Split system, 407. 780" Splitter dampers, 368 Spray cooling ponds, 500 cooling tower, 501 distribution', 491 drier, 620 equipment. 487 generation. 491 humidifiers, 492 type air conditioning unit, 419 Square foot of heating surface, 780 Squeeze dampers, 368 Squirrel cage induction motors, 673 Stack, stacks, 514, 643 height, 780 smoke. 514 Standard air, 780 Static, efficiency. 517 pressure, 517, 781 Stationary ventilator, 643 Steam, 1, 781 boiler connections, 300 boilers. 239 coils, 462 consumption for buildings, 237 distribution piping, 725 electric heating, 709 estimating, 236 heating systems, 267, 781 air line. 271 condensation return, 274 corrosion, 346 drips. 307 gravity one-pipe air-vent, 268 gravity return, 267 gravity two-pipe air-vent, 271 mechanical return, 267 one-pipe vapor, 271 orifice. 278 piping for, 287 pressure drop, 270 radiator valves, 269 railway car, 587 sub-atmospheric, 276 two-pipe vapor, 272 vacuum, 274 zone control, 279 flow, 289 flow in pipes, 288 high pressure, 302 overhead distribution, 730 pipe capacities, 295 properties of, 27 purchased, 725 requirements, 736 trap, 781 utilization, 739 velocity, 725 Steam jet, compressors, 432 systems, 437 Steel boilers, 240 Steel pipe sizes, 314 Stefan-Boltzman formula, 683 Sterilizing air, 49 in operating rooms, 576 Stoker-fired units, 204 Stokers, 199 apartment house,>204 combustion adjustments, 209 combustion process. 207 controls, 210, 665 furnace design, 208 household, 202 t operating requirements for, 203 orsat test, 209 over-feed flat grate, 199 over-feed inclined grate, 200 under-feed rear cleaning, 201 under-feed side cleaning, 200 Storage, tank capacity, 760 tanks, hot water, 710 Store air conditioners, 415 Sub-atmospheric heating systems, 276 Sub-bituminous, (see Coal) firing methods for, 172 Submerged heating coil, 758 Summer, comfort zone, 61 indoor conditions, 70 Superheat of refrigerants, 32 XXI