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Heating Ventilating Air Conditioning Guide 1960 Register, registers (continued) mechanical furnace systems, 247 noises, 284, 289, 353 selection, 247, 286 Regulator, 501, 502 Reheat, 269, 275 Relative humidity, 3, 15,- 29, 143 measurement of, 651 Relief valve, 420, <*> Residence control systems, 643 air conditioning, 643, 671 domestic hot water supply, 732 heating, 643 cooling methods, 267, 669 gravity furnace systems, 268, 669 heat kts problems, 173 hot water heating system, 403 mechanical furnace system, 247 steam heating system, 367 Residential air conditioning, 669 air distribution, 672 application, 670 central systems, 670 equipment capacity, 669 equipment location, 671 equipment types, 670 gas-nred, 671 noise, 671 operating costs, 672 Resistance thermometers, 646 Resistivity, thermal, 5 Resistors, 241 electric, 5 Return dry, 5 grille, 247, 289 5, 367, 379 Reversed return system, 6, .409 Ringelmann chart, 78, 653 Roof, roofs heat flow through, 124-128, 131, 188191, 194 time lag of sol** radiation, 201 ventilators, 155 Room air conditioners, 236, 670 air motion, 278, 284 control, 636 coolers, 235, 238 cross transmission noise, 363 latent heat, 207, 208 noise level, 351, 358 operating, 96' sensible neat, 207 Rotary diver, 740 Rotary oil burner, 500, 503 S Sabin, 5 Sanitary ventilation, 93 Saturated air, 1, 14 Saturation, 5 degree of, 5, 14, 17 .pressure, 4 Seale, 753 cause and prevention, 751, 753 dosed systems, 755 heating systems, 756 high temperature, 757 Scale (continued) open systems, 755 temperature, 5 School systems, 675 air supply, 677 control, 680 cooling, 678-680 design, 675 considerations, 676 criteria, 675 mechanical plant, 677 general considerations, 675 gravity exhaust, 678 heating, 678-680 maintenance, 680 mechanical exhaust, 678 operation, 680 types, 677-680 ventilating, 677 Secondary air, 482, 490, 507 Sensible cooling, 275 Sensible heat, 171, 177 gain, 177, 207 loss, 171 Shading of glass areas, 200, 205 fthaHmg screen, 205 Sheet metal gages, 308, 309 Ship heating, ventilation, air condi tioning, 686 air conditioning, 686, 687 design conditions, 688 factors affecting design, 686 Eeral consideration, 688 ting, 686 insulation of ducts, 686 refrigeration, 687 requirements for space, 686 cargo, 687 living, 686 machinery, 686 storeroom, 687 systems, typical, 687. ventilating, 686 Silica gel, 619, 621 Single phase motors, 662 Skylights, 155 Slime, 752, 758 cause and prevention, 758 formers, 752 Slotted outlets, 285 Sludge, 751. 753 cause and prevention, 753 Smog, 78, 93 Smoke, 5, 75, 77 abatement, 77, 482 density measurements, 653 Smokeles arch, 5 Smokeless combustion, 482 Snow melting, 689 antifreeze characteristics, 694 circulating medium, 5 control, 697 effect of viscosity, @5 design, 689, 698 draining, 697 drifting snow, 698 heat from slab, 689, 692 heating requirements, 689 hydraulic requirements, 695 installation, 697 internal corrosion, 697 operating data, 693 pumping head, 695 . safety, 697 ' dab construction, 691, 697 snowfall, 690, 691 xx Snow melting (continued) testing installation, 697 thermal stresses, 697 Soil specific heat, 105 - Solar constant, 5, 179 Solar heat, 179 absorbed by glam, 195 altitude. 179 calculation tables, 187, 158, 190-204 through shaded windows, 200, 205 time lag, 201 transmission of, 179 through glass, I9S through block, 198 through roofs, 188 through walls, 188 Solar heat gain, 179 basic principles, 179 design for figured rolled glass, 197 design for fist glass, 197 design for glass block, 198 deviation from dgn, 200 shading glass, 200, 205 Solar radiation, 179 absorption of, 179 magnitude, 179 ' Solar water heater, 784 Sol-air temperature,-188Solid adsorption, 620 Soot, 75, 482, 495 Sorbents, 619 absorbents, 619, 620 adsorbents, 619 Sorption, 5, 624 Sound (see Noise), 345 absorbers, 354, 355 apparatus for measuring, 346, 654 attenuation, 346 control, 345 cross transmission between rooms, 363 general problems, 345 duct absorbers, 354-356 intensity, 346 levels, 345, 351 measurements, .346, 654 outlet absorbers, 356 pressure, 345 unit, 345, 346 Space heaters, 527-530 design, 528, 529 rating, 528-530 Specific gravity, 3 Split systems, 5 Splitter dampers, 288 Spray apparatus, 597 booths, 724 cooling, 598 cooling ponds, 598 cooling towers, 599-607 dehumidifier, 271, 274, 612 dryer, 741 equipment, 598-600 humidifiers, 609-612 unit air conditioner, 235 Spread, air distribution, 277, 278, 283 Square foot of beating, surface, 5 Squirrel-cage induction motor, 659, 660, 664 Stack, stacks, 149, 156, 531 height, 5, 157 Index to Technical Data Secrton Standard, standards (see also Codes), 787 air, 1 air distribution, 277 atmosphere, 35 Standard air, 1 Static electricity elimination, 707 pressure, 4, 293, 313 SteadyQflow, energy equation, 13, 37 Steam, 5 coils, 324, 328 ___ distribution piping, 373, 397-401 ^imating consumption, 396, 397, 554, 555 flow, 374, 378, 377 flow measurement, 42, 401 heated equipment, 211, 396 beating systems, 5, 367 condensate return, 387, 400 connections to uruta, 392 control valves, 394 corrosion, 757 drips, 392 flash leg, 392 gravity one-pipe air-vent, 368, 369 gravity return, 367 Hartford return, 386 high premure steam, 376-381 low pressure steam, 376-378 mechanical return, 367 one-pipe, 367, 368 orifice, 372 piping for, 873 __ aubatmospheric, 372 two pipe, 369 vacuum, 371 vapor, 370 jet type system, 5fi) metera, 42, 401 panel heating, 431 pipe capacities, 376-381 properties, 14, 28 reducing valves, 383 requirements! 395, 555 risers, 367, 378, 379 runout, 368 * superheated, 5 tables, 18, 26 traps, 5, 388 valves, 394 velocity, 376, .377, 397 Stoker, stokers, 497 classification of, 497 combustion adjustments, 498 combustion process, 498 controls, 510, 611 furnace design, 499 mechanical,, 497 overfeed flat grate, 497 overfeed inclined grate, 497 sizing and ratings, 499 underfeed, 497 Subatmospheric systems, 372 air-conditioning systems, 177,669 Summer climatic conditions, 180-185 Summer comfort, 72, 73 Superheated steam, 5 Supply mains, 5 Supply openings, 247, 277, 285. 287 measurement of velocities, 650 Supports, pipe, 460 Surface condensation, 137, 142, 144, 475 Surface (continued) conductance, 2, 105, 108 coefficients, 108 external pipe, 448-450, 470 heating, 5 extended, 5 temperature, 134, 435, 521, 646 Suspended unit heater, 228 Symbols, 7, 8 air conditioning, 9-12 for drawings, 9 heating, 9, 10 piping, 9, 10 ventilating, 10, 11 T air changes, 152 air-conditioning temperatures and hu midities, 699-70? air leakage, 150-152 air requirements, 63 air, volume of, 18-21 air and water mixture, 14 allowable concentration dust, fumes, 88 gases, vapors, 86, 87 altitude, pressure and temperature, 35 aluminum ducts, 309 analytical solutions for heat conduction, 60-62 anthracite size, 480, 481 antifreeze, solutions, 694 atmosphere, standard for altitudes, 35 atmospheric gas, 753 atmospheric impurities, 75, 753 attenuation data, lining board, 355 in straight ducts, 354 of branches, 358 of plate absorber, 356 attic ventilation, 132, 146 azimuth angle, 188 black body radiation, 54 boiler ratings, 517-519 bonnet pressure, 287 bonnet temperature, 263, 284 building load factors, 551 calorific value, 380, 485, 487, 490 capture velocities, 719 carbon dioxide maximum, 492 cast-iron boiler rating, 520 ceiling temperature, 1 chimney damage - survey, 541 chimney draft, 539 chimney efficiency, 539 circular equivalents of rectangular ducts, 298, 299 classification of coals, 480 motors, 660 water, 752 climatic conditions, 162, 180 coal analyses, 480 coal classification, 480 codes, 787 coil heat emission, 219 combustible elements and compounds, 490 combustion rates, 521 comfort ranges, 69 condenser design data, 603, 604 . conductance, 51, -109-111 air space, 108 conduction problem solution, 56, 60-62 conductivity materials, 50, 109-111, 466 contaminant, allowable in water, 763 contaminant exhaust, 719. convection conductances, 51 xxi Tables (continued) conversion equations, 8 conveying velocity, 722-724, 729 cooling tower performance, 602 cooling tower pipe size, 772 copper elbow equivalents, 408 copper sheets, 310 copper tube dimensions, 450 copper tube surface, 450 correction factors steam radiator, 221 water radiator, 221 corrosion resistance, 730, 731 cost of air conditioning, 748 degree days for cities, 547-651, 556, 557 design dry- and wet-bulb temperatures, 162-167, 178, 1S0-1SS, 686, 699 design humidity, 699-707 dew pointi fuels, 494 draft in chimneys, 539 draft requirements of appliances, 539 duct attenuation, 354-356 duct combinations, 258, 259 duct gages, 248, 308, 309 duct joints, 308, 309 duet sizing, 249, 252-262 duct velocity, 303 duct weight, 309, 310 dust concentration, 77, 87, 88 dust particle size, 76, 77 efficiency, utilization, 546 elbow equivalent, 300, 375, 408, 428, 770 electric heating systems, 242 electric water heaters, 779 emissivity factors, 54, 108 end reflection. 356 environmental conditions, limits, 67 equivalent length of fittings, 258, 259, 375, 428, 770 equivalent temperature differentials, 190, 192 exhaust, engines, 159 exhaust pipes for machines, 722-724 exhaust velocities, 719, 722-724 fabric filters, 342 fan outlet velocity, 319 fan speed, 319 fitting allowance, 258, 299, 375, 408, 428, 770 fitting dimensions, 462, 463 fixture flow, 765 fixture units, 766 flammability of gases and rapora, 89 flanged fittings surface, 470 flue gas dew point, 494 fluids, compressible, 41 free convection, 52 friction loss, pipe, 374, 377, 379, 407,508 friction, valves and fittings, 375, 408, 428, 770 - fuel combustion, 490 fuel consumption, 554 fuel oil properties, 484 fumes, concentration, 88 gas analysis, 487 gas piping capacity, 508 v gaseous fuel properties, 487 y glass block transfer, 133 . glass sheet transfer, 133 graphical symbols, 9 grille area correction, 354 heat absorbed, cooling water, 603 heat conductance, 51, 56, 109-111 heat equivalents, 173 beat flow walls and roofs, 112-131, 192 heat gain appliances, 210 coil heat emission, 219 glass, 196-199 glam blocks, 200-204 insulated cold pipes, 476