Galvanized 90° Top Takeoff
The take-off that leaves from the top of the trunk and turns 90° right away to run between the joists.
AirGreen codeAG-VC-01002
514 316-2973 · sales@airgreen.ca
Quick facts
The galvanized 90° top takeoff starts a round branch from the top of a main duct or plenum, then turns it horizontal. Takeoff and elbow are combined in a single piece: the branch rises and runs straight off between the joists.
The takeoff for basements where every inch counts
In a finished basement, or one being finished, the goal is to keep the ceiling high. The main duct is fastened under the joists; if the branches left from the side and then ran underneath, they would take up even more height. With a top takeoff, the branch goes directly into the space between two joists and runs parallel to them to the floor register.
Five diameters
Available in 4, 5, 6, 8 and 10 in. The size is the diameter of the round branch, chosen according to the airflow needed in the room.
Installation
- Hold the takeoff on top of the duct, outlet facing the branch, and trace the opening.
- Cut cleanly, insert the takeoff and fasten it with sheet metal screws.
- Seal around the edge with mastic or aluminum tape.
- Install an accessible round damper on the branch for balancing.
By combining takeoff and elbow, you eliminate a joint, and with it a source of air leakage in the ceiling.
Installed by AirGreen in Greater Montréal
We add and redo forced-air branches in Montréal, Laval, Longueuil, on the South Shore and the North Shore. RBQ licence 5645-9605-01, subcategory 15.8 Ventilation. For availability or a quote, call us at 514 316-2973 or email sales@airgreen.ca with the diameter and the number of takeoffs.
Saving headroom under the joists
The trunk often sits tight under the joists: the top take-off lifts the branch into the space between them, without a separate elbow.
- Branches that must run between the joists, parallel to them
- Basements where you want to keep the ceiling as high as possible
- Branch take-offs on a furnace or central heat pump plenum
- Replacing a leaky take-off and elbow assembly
5 sizes, one page
Each size has its own AirGreen code. Tap a row to select it.
| Dimensions | AirGreen code |
|---|---|
| 4 in | AG-VC-01001 |
| 5 in | AG-VC-01002 |
| 6 in | AG-VC-01003 |
| 8 in | AG-VC-01004 |
| 10 in | AG-VC-01005 |
Diameter of the round branch.
Specifications
From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.
What to know before installing
- The size is the diameter of the round branch.
- Point the outlet toward the branch before fastening the take-off.
- Screw the take-off to the trunk and seal all around.
- Add a damper on the branch so the room can be balanced.
You may also need
Galvanized Side Take-Off
Galvanized Round Damper (Balancing Key)
Galvanized Round Pipe – 60 in Length
Galvanized Angled Boot
Extended Galvanized Outlet (Boot)
Galvanized Round End Cap
Cleats for Galvanized Duct (C and S)
Galvanized Oval Duct – 60 in LengthVentilation ductsSee all
Frequently asked questions
How is it different from a side take-off?
The side take-off leaves from the side of the trunk. The top take-off leaves from the top and turns 90°, which runs the branch between the joists.
Can it go on a plenum?
Yes, on a horizontal face of the plenum, with the outlet pointing toward the branch.
Do I need a damper?
It is recommended. Add a round damper on the branch, in a straight and reachable section.
Can you install it?
Yes. We rebuild and add forced-air branches across Greater Montréal, including during basement finishing.
Branches tucked away under your floors
Tell us the size and the quantity: we confirm availability and send you a quote. Or let our technicians install it for you.
Specifications from the manufacturer’s documentation, checked on October 7, 2026.