20" x 12" Duct Tee with 6" x 6" Branch — $109.92
- Trunk: 20" x 12"
- Branch: 6" x 6"
- Gauge: 22 ga
- Material: Galvanized Steel
- Connections: Slip & drive
- Fabrication: Made to order in Pittsburgh, PA
- Lead time: Ships in 1 business day
- Returns: Made to order, not returnable
Custom fabricated duct tee: 20" x 12" trunk with 6" x 6" branch, 22-gauge galvanized steel, slip-and-drive connections. Branch collar cut and riveted into the trunk.
20" x 12" Duct Tee with 6" x 6" Branch: sizing numbers
Worked out from this size's dimensions, so you can check it against your duct design before you order.
| Trunk free area | 1.67 sq ft (20" x 12") |
| Branch free area | 0.25 sq ft (6" x 6") |
| Branch share of trunk area | 15% |
| Trunk equivalent round duct | 16.8" diameter |
| Branch equivalent round duct | 6.6" diameter |
Airflow by velocity
| Air velocity | Trunk (1.67 sq ft) | Branch (0.25 sq ft) |
|---|---|---|
| 600 fpm | 1,000 CFM | 150 CFM |
| 700 fpm | 1,165 CFM | 175 CFM |
| 900 fpm | 1,500 CFM | 225 CFM |
| 1,200 fpm | 2,000 CFM | 300 CFM |
Airflow is free area times air velocity. Pick the row that matches the velocity your design uses; these figures are capacity at that velocity, not a pressure-loss calculation.
Questions about this size
How many CFM does a 20" x 12" tee with a 6" x 6" branch carry?
About 1,165 CFM at 700 fpm and 1,500 CFM at 900 fpm. The 20" x 12" trunk has 1.67 sq ft of free area, and airflow is free area times air velocity, so multiply 1.67 by the velocity your design calls for.
How much air does the 6" x 6" branch take from a 20" x 12" trunk?
The branch opening has 0.25 sq ft of free area, 15% of the trunk's 1.67 sq ft. At the same velocity in both, that is about 175 of every 1,165 CFM in the trunk at 700 fpm. The real split depends on the duct system downstream and on balancing dampers.
What gauge is a 20" x 12" tee with a 6" x 6" branch made in?
22-gauge galvanized steel. PMX picks the gauge from the distance around the largest opening: the 20" x 12" trunk is 64" around, and openings that measure over 54" up to 84" around are built in 22 gauge. The configurator on this page lets you choose 26, 24, 22 or 20 gauge and re-prices it.
How much does a 20" x 12" tee with a 6" x 6" branch cost?
$109.92 as configured on this page: 22-gauge galvanized steel, made to order. The price comes from the same quoting engine that prices the cart, and changing any dimension in the configurator re-prices it. The same size is $174.92 in aluminum and $239.92 in stainless steel.
Can I order a duct tee in a different size?
Yes. This page is one published size; the configurator above is loaded with these dimensions and every one of them can be changed to the size you measured, in galvanized steel, aluminum or stainless steel. Each fitting is cut and formed for the order in Pittsburgh, PA.
How fast does a 20" x 12" tee with a 6" x 6" branch ship, and can it be returned?
It ships in 1 business day from our Pittsburgh, PA shop, by UPS or by LTL freight for large orders, anywhere in the continental US. Shipping is calculated at checkout from the order's weight and destination. Because it is made to the dimensions you order, it is not returnable.
About this size
This page is the 20" x 12" Duct Tee with 6" x 6" Branch configuration of our duct tee. It is cut and formed for this order — nothing here is a stock import part. The configurator above is loaded with these exact dimensions, so you can add it to the cart as-is, or change a dimension and it re-prices instantly.