Oval Ceiling Boot (Oval Duct)
The boot that ends an oval duct at the ceiling, under the register, where there is no room for round duct.
AirGreen codeAG-VC-02601
514 316-2973 · sales@airgreen.ca
Quick facts
The oval ceiling boot terminates an oval duct at the ceiling. It takes the duct on one side and presents, on the other, the opening the grille sits on. Offered in 5 and 6 in, it completes the oval family for networks that run through shallow ceilings.
Supplying a room through the ceiling
In a condo, a floor with no access from below or a finished basement, it is often simpler to bring the air in through the ceiling. When that ceiling is thin, oval duct is the way to go, and it needs a boot made for it. Rather than switching back to round just before the grille — which would take more height — the oval ceiling boot connects directly to the duct. It is used on forced-air networks as well as on air exchanger networks.
Two sizes
Offered in 5 and 6 in, to match the oval duct that feeds it. The opening dimensions are not shown here: ask for them before choosing the grille and cutting the drywall.
Installation
- Hold the boot in place and trace the ceiling opening around its outline.
- Fasten the boot to the framing so the grille sits flat.
- Screw on the oval duct and seal the joint with aluminum tape or mastic.
- Also seal around the opening so the air does not escape into the ceiling.
The grille is not included.
Installed by AirGreen across Greater Montréal
We install ceiling boots and their ducts in Montréal, Laval, Longueuil, 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 size and quantity.
The end of the line, at the ceiling
When oval duct runs through a shallow ceiling, it needs an outlet made for it: this one takes the duct and presents the opening to the register.
- Ceiling outlets on an oval-duct system
- Feeding a room through the ceiling when the floor is not reachable
- Air exchanger outlets in a low ceiling
- Replacing an existing oval-duct ceiling boot
2 sizes, one page
Each size has its own AirGreen code. Tap a row to select it.
Size of the oval duct to connect.
Specifications
From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.
What to know before installing
- Choose the size of the oval duct feeding it.
- The opening dimensions are not listed here: ask for them to choose the register before cutting the drywall.
- Fasten the boot to the framing so the register sits flat.
- Seal the duct joint and the edge of the opening.
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Frequently asked questions
Which register fits this boot?
One that matches the boot’s opening. Ask us for the opening dimensions before buying the register or cutting the ceiling.
Can it go in a wall?
It is meant for the ceiling. For another position, write to us with your layout and we will point you to the right boot.
Is the register included?
No, the boot is the sheet-metal fitting only.
Can you install it?
Yes. We install ceiling boots and their ducts on our installations across Greater Montréal.
Well-connected ceiling outlets
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.