1134 CHAPTER 50 1956 Guide climates, however, where air conditioning is the primary consideration, the summer air-flow rate may be used the year around.

To Be Made Effective: 2601-9 g. a-. if*-*- Merchandise Bulletin April 13, 1956 TO ALL SALESMEN AND PIPE INSTRUCTORS Keasbey and Mattison Class 100 "Century Fluid=Tite" Pipe For your general information and to enable vcu to keep abreast of the competitive situation, we have just been reliably informed that subject competitor is starting this month to manufacture 4" and 6" Class 100 "Fluid-Tite" pine and that they expect to follow with the manufacture of 3", 8"9 10" and 12" in the order named.

:iti- Heating Ventilating Air Conditioning Guide 1957 Fuel oil (continued) viscosity, 354 weight per gallon, 356 Fumes, 4, 151 Furnace, furnaces, 4. 421 capacity, 423 casings, 425 cast iron, 423 design, 409, 426 efficiency, 426 duct, 399 fan, 422, 423 filters, 422 forced warm air, 422 gas-fired units, 397 grate area, -425 gravity warm air, 422, 434 beating surface, 424 heavy duty, 423 humidification equipment, 427 materials, 413, 428 mechanical warm air, 422 controls, 496 ' cooling methods, 503, 1204 dampers, 477 ducts, 478 fans, 422 filters, 422 method of designing, 426 motors, 422 ratings, 424 oil-fired units, 423 prime heating surface, 424 rating, 418, 424, 425 steel, 423 stoker-fired units, 380 types, 421 volume^ 4,352,386,389 warm air, 421 G Gage, gages . _ draft, 1224 pressure, 7,1223 sheet metal, 807, 808, 1109 Garage ventilation, 258 Gas, gases, 152, 158 appliance rating, 400 atmospheric, 152, 164 burner controls, 401 burners, 397 calorific value, 360, 361 central heating, 396 chimneys for heating, 448 classification of, 361 combustion of, 362 equipment, commercial, 402 equipment, industrial, 402 equipment ratings, 400 estimating consumption, 467 expansion factor, 81, 82 flammable, 157 flue, 370 analysis, 372 dew point, 376,1064 loss, 373, 375 heaters, 431 liquified petroleum, 359, 362 manufactured, 359, 361 mixed, 361 natural, 350-361 perfect relationship, 27 pipe size, 401 solubility, 1051 space heaters, 398, 431 wall heaters, 399 Gaseous fuels, 359 calorific value, 360, 361 classification of, 360, 361 combustion of, 362, 399 i maximum carbon dioxide values, 371 products of combustion, 366, 368. properties of, 360 specific gravity, 360 theoretical air requirements, 368, 370 typical analyses, 360 Gas-fired appliances, 396 boilers, 396 combustion process, 399 controls, 418 conversion burners, 397 furnaces, 397 * measurement of efficiency of combustion, 399 pipe size, 401 ratings for, 400 sizing heating plants, 401 space beaters, 398 Glass coefficient of transmission, 212 design tables, 311-320".

r*rr a rvrrD a 1957 Guide 50 veniently used to interpolate values for the enthalpy, specific volume, and entropy of moist air from the data of Table 2.

268 CHAPTER 12 1957 Guide Table 1.

284 CHAPTER 12 1957 Guide Notes for Table 8.

798 CHAPTER 31 1957 Guide terns are becoming increasingly numerous and design experiences reported are the present best guide.16-23 For residences and low pressure commercial systems, the values given in Table 5 may be used.

1080 CHAPTER 43 1957 Guide the refrigeration load factor is highest.

Heating Systems Boilers, Hot water, ' Steam.

276 CHAPTER 12 1958 Guide " necessary to,make an allowance for floor heat loss from rooms located over the basement.

.426 CHAPTER 16 ... 1958 Guide sufficient coal capacity for approximately an eight-hour firing, period plus a 20 percent reserve for igniting a new charge, more, grate, area may be re quired depending upon the depth of the fuel pot.

520- CHAPTER 20 ... 1958 Guide!

932 CHAPTER 36 1958 Guide Consideration must also be given to the probable frosting of the outdoorair heat-source coil at outdoor temperatures of approximately 36 F or be low.

loo CHAPTER 9 1959 Guide Table 4 ....

168 CHAPTER 13 1959 Guide Table l....