Specifications
- Trunk Width: 2" to 48"
- Trunk Height: 2" to 48"
- Trunk Length: 6" to 60"
- Branch Width: 2" to 36"
- Branch Height: 2" to 36"
- Branch Length: 4" to 36"
- Materials: Galvanized Steel, Aluminum, Stainless Steel
- Gauges: 26, 24, 22, 20
- Connections: Raw, Slip, Drive, TDC, Flanged
Standard Duct Cross Sizes & Pricing
| Trunk W×H | Trunk Len | Branch W×H | Branch Len | Material | Gauge | Joints | Price | Order |
|---|---|---|---|---|---|---|---|---|
| 8"×8" | 18" | 6"×6" | 8" | Galvanized | 26 ga | Slip/Slip | $32.40 | |
| 10"×8" | 18" | 6"×6" | 8" | Galvanized | 26 ga | Slip/Slip | $36.80 | |
| 10"×8" | 24" | 8"×6" | 10" | Galvanized | 26 ga | Slip/Slip | $42.60 | |
| 12"×8" | 24" | 8"×8" | 10" | Galvanized | 26 ga | Slip/Slip | $48.40 | |
| 12"×10" | 24" | 8"×8" | 12" | Galvanized | 26 ga | Slip/Slip | $54.20 | |
| 14"×10" | 24" | 8"×8" | 12" | Galvanized | 26 ga | Slip/Slip | $62.40 | |
| 14"×10" | 30" | 10"×8" | 14" | Galvanized | 26 ga | Slip/Slip | $72.80 | |
| 16"×10" | 30" | 10"×8" | 14" | Galvanized | 24 ga | Slip/Slip | $88.40 | |
| 16"×12" | 30" | 12"×10" | 14" | Galvanized | 24 ga | TDC/Slip | $102.60 | |
| 18"×12" | 36" | 12"×10" | 16" | Galvanized | 24 ga | TDC/Slip | $118.40 | |
| 20"×14" | 36" | 14"×10" | 16" | Galvanized | 22 ga | TDC/TDC | $168.40 | |
| 24"×18" | 48" | 14"×12" | 18" | Galvanized | 22 ga | TDC/TDC | $215.60 | |
| 24"×24" | 48" | 18"×14" | 18" | Galvanized | 20 ga | Flanged/Flanged | $278.40 | |
| 36"×24" | 48" | 24"×18" | 24" | Galvanized | 20 ga | Flanged/Flanged | $340.00 | |
| 14"×10" | 24" | 8"×8" | 12" | Aluminum | 26 ga | Slip/Slip | $115.20 | |
| 14"×10" | 24" | 8"×8" | 12" | Stainless | 26 ga | Slip/Slip | $212.80 |
Custom Duct Cross Fittings — 4-Way Air Distribution
Duct cross fittings are 4-way junctions that distribute airflow from a trunk line into two perpendicular branch runs simultaneously. Essentially a tee fitting with branches on both sides, the cross fitting eliminates the need for two separate tee fittings at the same location. Each cross is fabricated with independent trunk and branch dimensions, and the two opposing branches are identical in size.
When to Use a Cross vs. Two Tees
Use a cross fitting whenever two branch runs exit opposite sides of the trunk at the same point. This is common at corridor intersections in commercial buildings, at central distribution points in residential basements, and wherever a trunk line feeds rooms on both sides simultaneously. A single cross fitting is cheaper, faster to install, and produces less turbulence than two closely-spaced tees.
Airflow Balancing in Cross Fittings
Because both branches draw from the same trunk section, the combined branch airflow should not exceed the upstream trunk capacity. The two opposing branches naturally balance each other due to symmetric geometry, but differences in downstream run length and resistance can cause imbalance. Volume dampers at each branch outlet are recommended for precise zone balancing.
Commercial & Industrial Applications
Large commercial HVAC systems use cross fittings at major distribution points where a main trunk serves zones on both sides of a corridor or building core. Industrial exhaust systems use crosses to collect from workstations on both sides of a collection trunk. Our custom sizing handles trunk dimensions up to 48"×48" with branches up to 36"×36".
Frequently Asked Questions
When should I use a cross fitting instead of two tees?
Use a cross fitting whenever two branch runs exit opposite sides of the trunk at the same point. A single cross is cheaper, faster to install, and produces less turbulence than two closely-spaced tees.
Are the two branches the same size?
Yes. The two opposing branches are identical in size. Each cross has independent trunk and branch dimensions, but the branches on both sides match.
What connection types are available?
Raw, Slip, Drive, TDC, and Flanged connections are available on all openings independently.