. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students . 175 4 60 8 0 29 .33 21J 23 29J 19J- 231 24 205 21 20 4 70 3 6 33 37 215 26 335 232 27 28 24 235 225 4 80 4 0 3r 42 27 30 38J 264 81 315 265 245 233 4 90 4 6 42 47 30S 34 423 30i 34J 35 30 285 255 4 100 5 0 46 52 345 38 m 335 385 335 33 305 283 6 110 6 6 50 57 871 42 52 871 425 42 355 32 801 6 120 6 0 65 62 415 46 57 411 465 465 39J 355 333 6 140 7 0 64 72 48 63 66 48 54 58 46 395 375 8 160 8 0 72 82 64 60 75i 54 62 595 51 43 411 8 180 9 0 81 92 60 68 84J 605 695 67 575 46 441 8 2
. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students . 175 4 60 8 0 29 .33 21J 23 29J 19J- 231 24 205 21 20 4 70 3 6 33 37 215 26 335 232 27 28 24 235 225 4 80 4 0 3r 42 27 30 38J 264 81 315 265 245 233 4 90 4 6 42 47 30S 34 423 30i 34J 35 30 285 255 4 100 5 0 46 52 345 38 m 335 385 335 33 305 283 6 110 6 6 50 57 871 42 52 871 425 42 355 32 801 6 120 6 0 65 62 415 46 57 411 465 465 39J 355 333 6 140 7 0 64 72 48 63 66 48 54 58 46 395 375 8 160 8 0 72 82 64 60 75i 54 62 595 51 43 411 8 180 9 0 81 92 60 68 84J 605 695 67 575 46 441 8 200 10 0 90 102 66 76 935 665 77i 74 635 525 50 10 There are various methods of calculating the capacity andhorse power of ideal fans working against known pressures, butas these results are greatly changed by variations in the propor-tions of fan and casing, and also by the resistance imposed by theconnecting ducts and flues, it does not seem wise in a book of this PANS 197 kind to take np the purely theoretical side of the subject to anygreat extent. The methods given are based upon a series of carefully con-. I. D- I Fig. 144. Table OP Fans with Three-quarter Housing. See Fig. 144. Size Diameterof wheel A B C D E F G J K L In. Ft. In. In. In. In. In. In. In. In. In. In. In. 50 2 6 24J. m 20 18 27 14 9J 18S 17ii 60 3 0 29i m 28 21J 32 IBJ 12i 21 20 70 8 6 33J 23J 28 24J 37 17 16i &i 224 83 4 0 38J 26S 30 27 42 19 17i 24i 23; 90 4 6 42J. .3Di 34 305 47 214 19 25^ 100 5 0 47i m 38 84i 52 24 21 30,i 283 6 110 5 6 62 37i 42 37^ 57 86 23 33 80} 6 120 6 0 B7 m 46 41J 62 281 26 85i 83? 6 140 7 0 66 48 53 48 72 32 30 39* 37J 8 160 8 0 75i B4 60 54 82 865 85 43 41J 8 180 9 0 84S 60J 68 60 92 40 39 46 44J 8 200 10 0 931 66J 76 66 102 44 43J 52S 50 10 ducted tests made by one of the leading manufacturers of fansupon their standard steel-plate blowers and exhausters. Whilethe results thus obtained apply particularly to fans of their ownmake, they may be used with a fa
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectventilation, bookyear
