
Performance
Fan Drive Selections
Table 36 Supply Air Fan Drive Selections
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| Horse Power (HP) |
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| Low/ |
| 15 HP | 20 HP | 25 HP | 30 HP | 40 HP | 50 HP | 60 HP | 75 HP |
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Casing | Std | RPM | Drive No. | Drive No. | Drive No. | Drive No. | Drive No. | Drive No. | Drive No. | Drive No. |
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| 2000 |
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| L |
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| 1900 |
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| K |
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| 1800 |
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| J |
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A | Std |
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1700 |
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| H |
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| 1600 |
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| G |
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| 1500 |
| F |
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| 1400 | E | E |
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| 1500 |
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| F |
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| 1400 |
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| E | E |
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| 1300 |
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| D | D |
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B | Std |
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1200 |
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| C | C |
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| 1100 |
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| B | B |
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| 1000 |
| A | A |
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| 900 | 9 | 9 |
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| 1300 |
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| D | D(i) |
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| 1200 |
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| C | C |
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C | Std | 1100 |
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| B | B |
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1000 |
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| A | A |
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| 900 |
| 9 | 9 | 9 |
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| 800 | 8 | 8 | 8 |
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(i)If a 75HP motor is chosen on a fan with IGV, drives D and E are allowed. If it is chosen on a fan without IGV only drive D is allowed.
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