Specifications
- Trunk Width: 2" to 48"
- Trunk Height: 2" to 48"
- Branch Width: 2" to 36"
- Branch Height: 2" to 36"
- Branch Length: 6" to 36"
- Materials: Galvanized Steel, Aluminum, Stainless Steel
- Gauges: 26, 24, 22, 20
- Connections: Raw, Slip, Drive, TDC, Flanged
Standard Duct Wye Sizes & Pricing
| Trunk W×H | Branch W×H | Branch Len | Material | Gauge | Joints | Price | Order |
|---|---|---|---|---|---|---|---|
| 8"×8" | 6"×6" | 8" | Galvanized | 26 ga | Slip/Slip | $24.60 | |
| 10"×8" | 6"×6" | 8" | Galvanized | 26 ga | Slip/Slip | $27.40 | |
| 10"×8" | 8"×6" | 10" | Galvanized | 26 ga | Slip/Slip | $31.20 | |
| 12"×8" | 8"×8" | 10" | Galvanized | 26 ga | Slip/Slip | $35.80 | |
| 12"×10" | 8"×8" | 10" | Galvanized | 26 ga | Slip/Slip | $38.40 | |
| 14"×10" | 8"×8" | 10" | Galvanized | 26 ga | Slip/Slip | $40.20 | |
| 14"×10" | 10"×8" | 12" | Galvanized | 26 ga | Slip/Slip | $46.80 | |
| 14"×12" | 10"×10" | 12" | Galvanized | 24 ga | Slip/Slip | $56.40 | |
| 16"×10" | 10"×8" | 12" | Galvanized | 24 ga | Slip/Slip | $58.80 | |
| 16"×12" | 12"×10" | 14" | Galvanized | 24 ga | TDC/Slip | $68.50 | |
| 18"×12" | 12"×10" | 14" | Galvanized | 24 ga | TDC/Slip | $76.20 | |
| 20"×14" | 14"×10" | 16" | Galvanized | 22 ga | TDC/Slip | $112.60 | |
| 24"×18" | 16"×12" | 18" | Galvanized | 22 ga | TDC/TDC | $145.80 | |
| 24"×24" | 18"×14" | 18" | Galvanized | 20 ga | Flanged/Flanged | $198.60 | |
| 36"×24" | 24"×18" | 24" | Galvanized | 20 ga | Flanged/Flanged | $245.00 | |
| 14"×10" | 8"×8" | 12" | Aluminum | 26 ga | Slip/Slip | $74.80 | |
| 14"×10" | 8"×8" | 12" | Stainless | 26 ga | Slip/Slip | $138.60 |
Custom Duct Wye Fittings — Y-Split Air Distribution
Duct wye fittings are Y-shaped junctions that split airflow from a trunk line into an angled branch. Unlike tee fittings where the branch exits at 90 degrees, wye fittings use a 30 to 45-degree branch angle that follows the natural momentum of the airflow. This angled takeoff produces significantly lower pressure drop and turbulence than a perpendicular tee, making wyes the preferred fitting for energy-efficient and low-noise systems.
Wye vs. Tee: When to Choose Each
Use a wye fitting when the branch run continues in roughly the same direction as the trunk—for example, splitting a trunk line that runs diagonally through a ceiling plenum. Wyes are also preferred in high-velocity systems where the pressure penalty of a 90-degree tee is unacceptable. Use a tee when the branch must exit perpendicular to the trunk, such as feeding a wall stack from a ceiling trunk.
Sizing for Balanced Airflow
The branch dimensions should be sized to carry the required CFM for the downstream zone at the design velocity. The combined cross-sectional area of the branch and downstream trunk should equal or exceed the upstream trunk area to avoid excessive velocity increase. Our custom sizing allows precise branch-to-trunk ratios that match your load calculations.
Commercial & Industrial Wye Applications
Large commercial systems use wye fittings extensively in medium and high-pressure duct distribution. The 45-degree branch angle is standard for systems above 3" static pressure. Industrial exhaust systems use wyes to combine multiple extraction points into a common trunk without the severe pressure losses of perpendicular connections. Stainless steel wyes are specified for welded fume exhaust and kitchen hood systems.
Frequently Asked Questions
What is the difference between a wye and a tee fitting?
A wye uses a 30-45 degree angled branch takeoff that follows airflow momentum, producing lower pressure drop and less turbulence. A tee has a 90-degree perpendicular branch.
When should I use a wye instead of a tee?
Use a wye when the branch continues in roughly the same direction as the trunk, or in high-velocity systems where the pressure penalty of a 90-degree tee is unacceptable.
What materials are available for wye fittings?
Galvanized steel (standard), aluminum (65% lighter), and stainless steel (maximum corrosion resistance). All materials available in 26, 24, 22, and 20 gauge.