20" x 10" to 10" x 8" Duct Reducer, 12" Long — $82.58
- Inlet: 20" x 10"
- Outlet: 10" x 8"
- Length: 12"
- 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 reducer from 20" x 10" down to 10" x 8" over 12", 22-gauge galvanized steel, slip-and-drive both ends. Made to order.
20" x 10" to 10" x 8" Duct Reducer, 12" Long: sizing numbers
Worked out from this size's dimensions, so you can check it against your duct design before you order.
| Inlet free area | 1.39 sq ft (20" x 10") |
| Outlet free area | 0.56 sq ft (10" x 8") |
| Outlet area as a share of inlet | 40% |
| Velocity change, inlet to outlet | x 2.50 |
| Reduction over the 12" body | 10" on the width, 2" on the depth |
| Inlet equivalent round duct | 15.2" diameter |
| Outlet equivalent round duct | 9.8" diameter |
Airflow by velocity
| Air velocity | Inlet (1.39 sq ft) | Outlet (0.56 sq ft) |
|---|---|---|
| 600 fpm | 835 CFM | 335 CFM |
| 700 fpm | 970 CFM | 390 CFM |
| 900 fpm | 1,250 CFM | 500 CFM |
| 1,200 fpm | 1,665 CFM | 665 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 much does the air speed up through a 20" x 10" to 10" x 8" reducer?
The outlet has 40% of the inlet's free area (0.56 sq ft against 1.39 sq ft), so the same airflow leaves about 2.50 times faster than it enters. At 900 fpm in the outlet the fitting is carrying 500 CFM, and the inlet side is moving at about 360 fpm.
How steep is the taper on a 20" x 10" to 10" x 8" reducer that is 12" long?
The width closes by 10" and the depth by 2" over the 12" body. Centred, the steeper pair of sides slopes about 23 degrees each; built flat on one side, the sloped side runs about 40 degrees. A longer body gives a gentler taper and a lower pressure loss.
What gauge is a 20" x 10" to 10" x 8" reducer made in?
22-gauge galvanized steel. PMX picks the gauge from the distance around the largest opening: the 20" x 10" inlet is 60" 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 10" to 10" x 8" reducer cost?
$82.58 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 $131.33 in aluminum and $180.08 in stainless steel. In galvanized steel, the 18" long version is $90.06.
Can I order a duct reducer 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 10" to 10" x 8" reducer 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 10" to 10" x 8" Duct Reducer, 12" Long configuration of our duct reducer. 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.