TDDDirect Drive Tubeaxial In-line Duct Fan
In-line Duct Fan Series
Model Features
- Rated up to 39,194 CFM in static pressure applications up to 1-1/4" w.g.
- Direct drive units have low sound levels and quiet operation
- Smaller sizes for areas with reduced airflow needs
- Require practically no maintenance
- cULus 705 Licensed
- AMCA Air Licensed
Model Overview
The Tubeaxial line offers the widest range of sizes, horsepower, and performance in the industry. TDD's are high capacity tubeaxial fans rated from 643 to 39,194 CFM, with static pressure capability up to 1-1/4". They are used to exhaust air from or supply air to commercial and industrial applications, such as general building ventilation, enclosed garages, and other applications where the air is moved through a duct system against moderate static pressure.
TDD's are best used for exhausting or supplying relatively clean ambient temperature air. They require practically no maintenance and are available in smaller sizes for areas with reduced airflow needs.
2-year fan housing warranty, 1-year motor warranty
TDD Specifications
| Size | Max HP | CFM Range | Max SP | Avg. Ship Weight (lbs) |
| 12 | 1/3 HP | 816 to 1,507 | 1/8" | 90 |
| 16 | 3/4 HP | 1,889 to 3,240 | 1/2" | 108 |
| 18 | 1-1/2 HP | 2,525 to 5,226 | 5/8" | 150 |
| 20 | 1 HP | 643 to 4,777 | 3/4" | 178 |
| 24 | 3 HP | 2,640 to 9,585 | 1" | 273 |
| 30 | 3 HP | 1,559 to 15,387 | 1-1/4" | 320 |
| 34 | 10 HP | 4,043 to 26,099 | 1-1/4" | 457 |
| 36 | 10 HP | 2,562 to 26,845 | 1-1/4" | 532 |
| 42 | 10 HP | 3,561 to 32,213 | 1-1/4" | 738 |
| 48 | 10 HP | 8,730 to 39,194 | 1" | 834 |
| Model Size | A | B | C 1 | B.C.D. |
| 12 | 12-3/8" | 15" | 12" | 13-1/2" |
| 16 | 16-3/8" | 18-7/8" | 16-1/2" | 17-3/8" |
| 18 | 18-3/8" | 22-1/2" | 22" | 19-3/4" |
| 20 | 20-3/8" | 24-1/2" | 22" | 21-3/4" |
| 24 | 24-3/8" | 28-5/8" | 23" | 25-3/4" |
| 30 | 30-3/8" | 34-5/8" | 24" | 32" |
| 34 | 34-3/8" | 38-5/8" | 27" | 36-3/8" |
| 36 | 36-3/8" | 40-58" | 29" | 38" |
| 42 | 42-1/2" | 46-3/4" | 30" | 44-1/4" |
| 48 | 48-1/2" | 52-3/4" | 33" | 50-3/4" |
1. Motor may extend past unit.
Note: Additional accessories are available for certain products. Contact your S&P Representative for more information about these accessories.
Standard Accessories
| Motor Cover | |
| Belt Guard | |
| Hanging and Floor Brackets | |
| Companion Flange (Inlet/Outlet) | |
| Inlet/Outlet Guard | |
| Mounting Rails | |
| Rubber Isolator (Floor) | |
| Rubber Isolator (Hanging) | |
| Spring Isolator (Floor) | |
| Spring Isolator (Hanging) | |
| Inspection Door | |
| Disconnect Switch | |
| Shaft Seal |
- General / Clean Air
- Contaminated Air
- Spark Resistant