TDD Direct Drive Tubeaxial In-line Duct Fan
Tubeaxial 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
- This product meets the requirements of Buy American (2009) and Build America, Buy America (BABA), as part of IIJA (2022). Download letter here.
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
| Size | CFM Range | Max SP |
| 12 | 816 to 1,507 | 1/8" |
| 16 | 1,889 to 3,240 | 1/2" |
| 18 | 2,525 to 5,226 | 5/8" |
| 20 | 643 to 4,777 | 3/4" |
| 24 | 2,640 to 9,585 | 1" |
| 30 | 1,559 to 15,387 | 1-1/4" |
| 34 | 4,043 to 26,099 | 1-1/4" |
| 36 | 2,562 to 26,845 | 1-1/4" |
| 42 | 3,561 to 32,213 | 1-1/4" |
| 48 | 8,730 to 39,194 | 1" |
| Size | A | B | C1 | 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. The motor may extend past unit size.
Note: Additional accessories are available for certain products. Contact your JencoFan Representative for more information about these accessories.
Standard Accessories
| Motor Cover | |
| Belt Guard | |
| Hanging and Floor Brackets | |
| Companion Flange (Inlet/Outlet) | |
| Inlet Guard | |
| Outlet Guard | |
| Mounting Rails | |
| Rubber Isolator | |
| Spring Isolator | |
| Inspection Door | |
| Disconnect Switches | |
| Shaft Seal |
- General/Clean Air
- Contaminated Air
- Spark Resistant