Extended Galvanized Outlet (Boot)
The long-body boot that reaches a register when the branch stops farther away.
AirGreen codeAG-VC-01504
514 316-2973 · sales@airgreen.ca
Quick facts
The extended galvanized outlet (boot) connects a round forced-air branch to a grille’s rectangular opening, like other outlets, but with a longer body. It is used when the grille sits farther from the end of the branch than a standard outlet can reach.
Reaching the grille without adding pieces
A grille’s location is often decided for the room — under a window, away from furniture — and not for the basement. The result: between the end of the branch and the opening, there is sometimes a joist, blocking or simply too much distance. Rather than adding a piece of duct, an elbow and two more joints, the extended outlet spans that distance in a single piece. Fewer joints means fewer air leaks between the joists.
Seven sizes
- 2-1/4 × 10 in: 5 in collar
- 3-1/4 × 10 in: 4, 5 or 6 in collar
- 4 × 10 in: 4, 5 or 6 in collar
The size reads as opening (width × length) × round collar diameter. The body length is not given here: if space is tight, send us your measurements before ordering.
Installation
Fasten the outlet securely to the joists or the subfloor, screw the duct to the collar and seal the collar as well as the perimeter of the opening with mastic or aluminum tape.
Installed by AirGreen across Greater Montréal
We install forced-air outlets and branches in Montréal, Laval, Longueuil, on the South Shore and on 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 full size and the quantity.
When the register is not right at the end of the branch
A joist, blocking or the register location sometimes puts the opening away from the end of the branch: the long boot covers that distance.
- Registers offset from the end of the branch
- Branches stopped short of an obstacle under the floor
- Replacing an existing long boot
- Floor outlets in renovated rooms
7 sizes, one page
Each size has its own AirGreen code. Tap a row to select it.
| Dimensions | AirGreen code |
|---|---|
| 2-1/4 × 10 × 5 in | AG-VC-01501 |
| 3-1/4 × 10 × 4 in | AG-VC-01502 |
| 3-1/4 × 10 × 5 in | AG-VC-01503 |
| 3-1/4 × 10 × 6 in | AG-VC-01504 |
| 4 × 10 × 4 in | AG-VC-01505 |
| 4 × 10 × 5 in | AG-VC-01506 |
| 4 × 10 × 6 in | AG-VC-01507 |
Rectangular opening (width × length) × round collar diameter, in inches.
Specifications
From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.
What to know before installing
- Sizes read width × length of the opening, then round collar diameter.
- Measure the distance from the end of the branch to the opening before choosing between a long and a standard boot.
- Fasten the boot to the joists: a longer body needs good support.
- Seal the collar and the edge of the opening.
You may also need
Galvanized Angled Boot
Galvanized Universal Register Boot
Galvanized Round Pipe – 60 in Length
Galvanized 90° Top Takeoff
Galvanized Round Damper (Balancing Key)
Galvanized Round End Cap
Cleats for Galvanized Duct (C and S)
Galvanized Oval Duct – 60 in LengthVentilation ductsSee all
Frequently asked questions
When should I choose a long boot?
When the register opening is farther from the end of the branch than a standard boot can reach, for example because of a joist or blocking.
Are the openings the same as the other boots?
Yes: 2-1/4 × 10, 3-1/4 × 10 and 4 × 10 in, with 4, 5 or 6 in collars depending on the size.
What are the overall dimensions?
The body length is not stated here. If space is critical, write to us with your measurements before ordering.
Can you install it?
Yes. We install forced-air boots and branches across Greater Montréal.
Outlets placed where you want them
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.