Backward Curved Centrifugal Fans
| Size | A | B | C | D | E | F | G | H | I | J | K | L | M | N | P | Q | R | S | T | U | V | W | X | Y | Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11 | 174 | 104 | 100 | 75 | 206 | 203 | 241 | 330 | 51 | 230 | 140 | 114 | 127 | 78 | 191 | 255 | 8 | 10 | 223 | 2 | 103 | 2 | 68 | 19 | 19 |
| 12 | 190 | 114 | 120 | 75 | 220 | 222 | 260 | 356 | 57 | 235 | 140 | 114 | 127 | 83 | 210 | 274 | 8 | 10 | 242 | 2 | 111 | 2 | 73 | 19 | 19 |
| 13 | 206 | 124 | 130 | 75 | 234 | 238 | 283 | 381 | 62 | 265 | 151 | 127 | 152 | 88 | 229 | 293 | 8 | 10 | 261 | 2 | 119 | 2 | 78 | 19 | 19 |
| 14 | 222 | 134 | 138 | 75 | 250 | 257 | 305 | 406 | 67 | 270 | 151 | 127 | 152 | 93 | 245 | 309 | 8 | 10 | 280 | 2 | 127 | 2 | 83 | 19 | 19 |
| 15 | 238 | 142 | 148 | 75 | 266 | 276 | 324 | 432 | 71 | 287 | 159 | 133 | 165 | 97 | 264 | 328 | 8 | 10 | 299 | 2 | 135 | 2 | 87 | 19 | 19 |
| 16 | 254 | 152 | 160 | 75 | 280 | 292 | 346 | 464 | 76 | 317 | 159 | 133 | 190 | 102 | 279 | 343 | 8 | 10 | 314 | 2 | 143 | 2 | 92 | 19 | 19 |
| 18 | 286 | 172 | 178 | 75 | 311 | 330 | 390 | 520 | 86 | 366 | 184 | 159 | 228 | 113 | 318 | 382 | 8 | 10 | 353 | 2 | 159 | 2 | 102 | 19 | 19 |
| 19 | 301 | 180 | 188 | 75 | 327 | 349 | 413 | 546 | 90 | 382 | 203 | 178 | 240 | 117 | 333 | 397 | 8 | 10 | 368 | 2 | 111 | 2 | 106 | 19 | 19 |
| 20 | 319 | 190 | 196 | 75 | 343 | 365 | 432 | 572 | 95 | 387 | 203 | 178 | 240 | 122 | 349 | 413 | 8 | 10 | 384 | 2 | 117 | 2 | 111 | 19 | 19 |