فوروارد Forward
| Dimensions | SPIn.w.g | CFM | Size | ||
| H | W | L | |||
| 690 | 590 | 580 | ¼-11 | 1200-3000 | SWSI-122 |
| 750 | 610 | 630 | ¼-11 | 1500-4000 | SWSI-135 |
| 840 | 680 | 700 | ¼-11 | 1800-5000 | SWSI-150 |
| 920 | 710 | 750 | ¼-11 | 2200-6000 | SWSI-165 |
| 1020 | 790 | 840 | ¼-12 | 2500-7000 | SWSI-182 |
| 1120 | 840 | 920 | ¼-12 | 3000-8000 | SWSI-200 |
| 1240 | 940 | 1020 | ¼-13 | 4000-9500 | SWSI-222 |
| 1370 | 990 | 1110 | ¼-13 | 5000-11000 | SWSI-245 |
| 1510 | 1100 | 1230 | ¼-15 | 7500-17000 | SWSI-270 |
| 1660 | 1200 | 1340 | ¼-15 | 9000-20000 | SWSI-300 |
| 1820 | 1280 | 1470 | ¼-15 | 10000-23000 | SWSI-330 |
| 1820 | 1420 | 1590 | ¼-15 | 13000-25000 | SWSI-365 |
| 1990 | 1570 | 1770 | ¼-15 | 18000-30000 | SWSI-402 |
| 2160 | 1730 | 1940 | ¼-15 | 21000-37000 | SWSI-445 |
| 2360 | 1890 | 2140 | ¼-15 | 25000-45000 | SWSI-490 |
| 2650 | 2060 | 2380 | ¼-15 | 30000-55000 | SWSI-542 |
| 2900 | 2290 | 2630 | ¼-19 | 40000-75000 | SWSI-600 |
| 3200 | 2510 | 2880 | ¼-23 | 45000-100000 | SWSI-660 |
| 3550 | 2730 | 3210 | ¼-23 | 50000-130000 | SWSI-730 |
| 3900 | 3020 | 3540 | ¼-23 | 50000-150000 | SWSI-807 |
