About Duct Connections
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Rectangular Duct and Fittings
Often used in tight spaces, such as in walls and ceilings, rectangular duct allows you to select larger sizes without increasing duct height. Duct and fittings have interconnecting ends that lock together with brackets.
For technical drawings and 3-D models, click on a part number.
Duct comes as two halves that lock together.
Galvanized Steel | ||||||
---|---|---|---|---|---|---|
Wd. | Ht. | Lg., ft. | Gauge | Includes | Each | |
8" | 8" | 4 | 28 | Two Drive Brackets, Two S-Brackets | 0000000 | 000000 |
10" | 8" | 4 | 28 | Two Drive Brackets, Two S-Brackets | 0000000 | 00000 |
12" | 8" | 4 | 28 | Two Drive Brackets, Two S-Brackets | 0000000 | 00000 |
14" | 8" | 4 | 28 | Two Drive Brackets, Two S-Brackets | 0000000 | 00000 |
16" | 8" | 4 | 26 | Two Drive Brackets, Two S-Brackets | 0000000 | 00000 |
20" | 8" | 4 | 26 | Two Drive Brackets, Two S-Brackets | 0000000 | 000000 |
24" | 8" | 4 | 26 | Two Drive Brackets, Two S-Brackets | 0000000 | 000000 |
Reducers decrease duct width by 2”.
Galvanized Steel | ||||
---|---|---|---|---|
Wd. | Ht. | Gauge | Each | |
2" | 8" | 28 | 0000000 | 000000 |
Quick-Disconnect Duct and Fittings
Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.
Galvanized steel has good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Standard Duct and Fittings
No need for clamps or connectors—duct and fittings press-fit together. Male ends are crimped or tapered, making them slightly smaller than a female end for simple assembly.
Galvanized steel has good corrosion resistance. Aluminum is more lightweight than steel and stainless steel and has good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Galvanized Steel | Aluminum | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Duct Size | Female ID | Male OD | Includes | End Construction | Gauge | Each | Gauge | Each | ||
Exhaust Vent | ||||||||||
3 | 3" | __ | Damper | Plain | __ | 000000 | 00 | 24 | 0000000 | 000000 |
4 | 4" | __ | Damper | Plain | 30 | 00000000 | 000000 | 24 | 0000000 | 00000 |
5 | 5" | __ | Damper | Plain | 30 | 00000000 | 00000 | __ | 000000 | 00 |
6 | 6" | __ | Damper | Plain | 30 | 00000000 | 00000 | 24 | 0000000 | 00000 |
7 | 7" | __ | Damper | Plain | 30 | 00000000 | 00000 | __ | 000000 | 00 |
8 | 8" | __ | Damper | Plain | 30 | 00000000 | 00000 | 24 | 0000000 | 000000 |
Intake Vent | ||||||||||
4 | __ | 3 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
5 | __ | 4 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
6 | __ | 5 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
7 | __ | 6 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
8 | __ | 7 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
Chemical-Resistant Duct and Fittings
Made of PVC plastic to withstand acids, alkalies, salts, and other corrosive vapors and fumes. Use PVC pipe cement (not included) to secure components. Fittings have female ends with a slightly larger diameter to press-fit over duct.
For technical drawings and 3-D models, click on a part number.
Fire-Rated Airflow Dampers
In the event of a fire, these dampers automatically stop airflow through duct. They have a fusible link that melts at 165° F, releasing a spring and causing the blades to close. Dampers meet UL 555 fire safety standards to help prevent the spread of fire for 1 ½ hours. They are undersized to fit inside duct.
For technical drawings and 3-D models, click on a part number.
For Duct | Overall | Galvanized Steel | ||||||
---|---|---|---|---|---|---|---|---|
Ht. | Wd. | Ht. | Wd. | Dp. | Gauge | Connection Type | Each | |
8" | 8" | 7 3/4" | 7 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 000000 |
12" | 12" | 11 3/4" | 11 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 00000 |
14" | 14" | 13 3/4" | 13 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 00000 |
18" | 18" | 17 3/4" | 17 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 000000 |
24" | 24" | 23 3/4" | 23 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 000000 |
Airflow Dampers
Regulate airflow by adjusting dampers from fully open to fully closed. Dampers are undersized to fit inside duct.
For technical drawings and 3-D models, click on a part number.
For Duct | Overall | Galvanized Steel | |||||||
---|---|---|---|---|---|---|---|---|---|
Ht. | Wd. | Ht. | Wd. | Dp. | Gauge | Seal Material | Connection Type | Each | |
12" | 12" | 11 3/4" | 11 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 0000000 |
14" | 14" | 13 3/4" | 13 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 000000 |
16" | 16" | 15 3/4" | 15 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 000000 |
24" | 24" | 23 3/4" | 23 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 000000 |
36" | 36" | 35 3/4" | 35 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 000000 |
Wall Vent Caps
Cover external vents to reduce downdrafts and prevent obstructions from entering the vent.
For Duct | Mounting | Painted Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Ht. | Wd. | Ht. | Wd. | Lg. | Gauge | Features | Includes | Fasteners Included | Hole Dia. | Each | |
For Rectangular Duct | |||||||||||
10" | 3 1/4" | 5 5/8" | 12 3/4" | 8 7/8" | 24 | Bird Screen | Backdraft Damper | No | 3/16" | 0000000 | 000000 |
Sloped Roof Vent Caps
Cover external vents to reduce downdrafts and prevent obstructions from entering the vent.
For Duct | Painted Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Ht. | Wd. | Dia. | Ht. | Wd. | Lg. | Gauge | Features | Includes | Each | |
For Rectangular and Round Duct | ||||||||||
10" | 3 1/4" | 8" | 6 5/8" | 14 1/4" | 18 3/4" | 24 | Bird Screen | Backdraft Damper | 0000000 | 000000 |