About Duct Connections
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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. 304 stainless steel is more corrosion resistant than steel and aluminum.
For technical drawings and 3-D models, click on a part number.
Galvanized Steel | 304 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | End Construction | Gauge | Each | Gauge | Each | ||
| 3 | 3" | Plain | 26 | 0000000 | 000000 | __ | 000000 | 00 |
| 4 | 4" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 000000 |
| 5 | 5" | Plain | 26 | 0000000 | 00000 | __ | 000000 | 00 |
| 6 | 6" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 00000 |
| 7 | 7" | Plain | 26 | 0000000 | 00000 | __ | 000000 | 00 |
| 8 | 8" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 00000 |
| 9 | 9" | Plain | 26 | 0000000 | 00000 | __ | 000000 | 00 |
| 10 | 10" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 000000 |
| 12 | 12" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 000000 |
Galvanized Steel | 304 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | Each | ||
Female | ||||||||
| 3 | 3" | __ | 26 | Plain | 00000000 | 00000 | 0000000 | 000000 |
| 4 | 4" | __ | 26 | Plain | 00000000 | 0000 | 0000000 | 00000 |
| 5 | 5" | __ | 26 | Plain | 00000000 | 0000 | 000000 | 00 |
| 6 | 6" | __ | 26 | Plain | 00000000 | 0000 | 0000000 | 00000 |
| 7 | 7" | __ | 26 | Plain | 00000000 | 00000 | 000000 | 00 |
| 8 | 8" | __ | 26 | Plain | 00000000 | 00000 | 0000000 | 00000 |
| 9 | 9" | __ | 26 | Plain | 00000000 | 00000 | 000000 | 00 |
| 10 | 10" | __ | 26 | Plain | 00000000 | 00000 | 0000000 | 000000 |
| 12 | 12" | __ | 26 | Plain | 00000000 | 00000 | 000000 | 00 |
| 14 | 14" | __ | 26 | Plain | 00000000 | 00000 | 000000 | 00 |
| 16 | 16" | __ | 26 | Plain | 00000000 | 00000 | 000000 | 00 |
| 18 | 18" | __ | 26 | Plain | 00000000 | 00000 | 000000 | 00 |
Male | ||||||||
| 3 | __ | 2 7/8" | 26 | Crimped | 00000000 | 0000 | 000000 | 00 |
| 4 | __ | 3 7/8" | 26 | Crimped | 00000000 | 0000 | 000000 | 00 |
| 5 | __ | 4 7/8" | 26 | Crimped | 00000000 | 0000 | 000000 | 00 |
| 6 | __ | 5 7/8" | 26 | Crimped | 00000000 | 0000 | 000000 | 00 |
| 7 | __ | 6 7/8" | 26 | Crimped | 00000000 | 00000 | 000000 | 00 |
| 8 | __ | 7 7/8" | 26 | Crimped | 00000000 | 00000 | 000000 | 00 |
| 9 | __ | 8 15/16" | 26 | Crimped | 00000000 | 00000 | 000000 | 00 |
| 10 | __ | 9 7/8" | 26 | Crimped | 00000000 | 00000 | 000000 | 00 |
| 12 | __ | 11 7/8" | 26 | Crimped | 00000000 | 00000 | 000000 | 00 |
| 14 | __ | 13 7/8" | 26 | Crimped | 00000000 | 00000 | 000000 | 00 |
| 16 | __ | 15 7/8" | 26 | Crimped | 00000000 | 00000 | 000000 | 00 |
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.
Furnace Draft Dampers
Also known as barometric dampers, these dampers improve furnace performance by automatically opening and closing to maintain a consistent airflow despite changing environmental conditions.
Single-acting dampers open inward to prevent strong drafts from pulling too much heat into the chimney vent.
Double-acting dampers open both inward and outward to relieve pressure caused by obstructions and downdrafts.