Heating Ventilating Air Conditioning Guide 1956 Exhaust systems {continued) relocity contours, 1043 ventilation rates, 1044-1047 make-up air, 1035 maintenance, 1055 materials, 1053, 1050, 1053 performance, 1055 pressure loss, 1051 specifications, 1053 suction requirements, 1055 types of fans, 1054 velocity contours, 1043 velocity requirements; 1044- 1051 ventilation rates. 1044-1049 Expansion factor, gases, 81, 83 of pipe, 639.644 tank installation, 551 tank piping, 548 tank use; 549 tanks, 548 valves, 875 Explosion hazard, 138 Extended plenum systems, 472, 473 F Pan. fans, 763 application,. 777 arrangement of drives, 772 attio, 779 location, 779 .axial flow, 763 centrifugal, 767 characteristic curves, 768-771 control, 774 designations, 764 drive position, 774 efficiency, 767 exhaust, 778 furnace system, 475 hot gas, 780 installation, 777 kitchen, 779 laws, 765 marine, 778 mine, 778 motive power,.775 noise generated, 946 performance, 763, 767, 768,946 radial flow, 763, 767 rotation, 773 ` selection of( 776 atr conditioning systems, 775 industrial exhaust systems, 1054 special application, 779 speed, 776 system characteristics, 771. types, 763 unitary systems, 778 velocity, operating. 776 volume control, 774 Panning formula, 69,556 Fever therapy, 142 equipment for production of, 143 Film conductance, 93, 167, 168, 177 Filter, filters. 781 air conditioning units, 613 atmosphere, 781 'charged media, 776 dry air, 785, 796, 1094 dust, 785 installation, 790 ionising, 785 ' maintenance, 789 moving curtain; 784 performance, 787 selection, 789, 793 testing, 787 vapor adsorption, 799 viscous impingement type, 783 Pitting allowance pipe, 609,537,1113 sheet metal, 482, 483, 740 Flash leg. 530 Flexible mountings, 959 Float trap, 524 Floor cooling unit, 609 heat transfer coefficients, 194, 195 panel design, 580 unit heater, 595 Floor slab heat loss, .263 Flow coefficient, orifices, 77 compressible fluids, 73 ' critical, 76 measurement head meters, 78, 83 liquids, 78 orifices, 78 Pitot tube, 84,1152 variable area meters, 85 Flow meters, 78,683,1111 Flue gas analysis, 360 Flue gas dew-point, 364 Flue gas loss, 361 Fluids, flow, 67 theory, 67 Fluid metera, 78, till Fog, 4, 162 Force,4 Forced air heating system, 475 circulation pipe sixes, 542 convection, 91-93 Free convection. 92, 93 enthalpy, 4 Fleeting in gripes, 666 Friction loss air ducts, 489,731 circular pipes, 69 effect of area change, 744 elbows. 468, 482, 609, 637. 742, 1112 gas piping, 389 high temperature, 556 non-circular pipes, 72 refrigerant piping, 878. 879 water heating, 537,539- ' water piping, 537-639, 655, 1108-1110 Fuel, fuels, 331 analysis, 331, 341, 348 burning equipment, 387 classification, 383.334,340,349 consumption, 445 calculated heat-loss method,' 447 degree-day method, 449 load factor, 461 maximum demands, 461 seasonal efficiency, 440 unit, 466-459 firing methods, 336,336,337 s; gna.347 Squid, 340 solid, 331 unit consumption, 456,457 utilisation, 410.
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