What Is a Round Grille? Specs and How to Specify One
A round grille has a circular face built to match round duct and spiral duct systems directly, without a transition fitting. Specs, applications, and how to specify one.
A round grille is an HVAC air terminal with a circular face, built to connect directly to round duct or spiral duct without a square-to-round transition fitting. Goodwind manufactures the Round Grille (model GT-RG) in aluminum, steel, or custom material, for commercial, residential, and industrial projects.
Round Grille Specifications
| Spec | Detail |
|---|---|
| Model | GT-RG |
| Material | Aluminum, steel, or custom |
| Finish | Powder coated, anodized, or custom colors |
| Mounting | Wall, ceiling, duct, or floor |
| Applications | Commercial, residential, industrial |
Where Round Grilles Are Used
A round grille's main advantage is fitting directly onto round or spiral duct, so it's a common choice on projects already running round ductwork rather than rectangular. It shows up often in residential retrofits and smaller commercial spaces where spiral duct is the standard, avoiding the extra fitting and installation time a square-to-round transition would add.
How to Specify a Round Grille
For MEP Consultants at the Design Stage
Specify a round grille where the duct run is already round or spiral, so the connection is direct. If the ductwork upstream is rectangular, a square or rectangular grille avoids adding a transition fitting purely to accommodate the terminal.
For Contractors at Procurement Stage
Confirm the neck diameter against the actual duct size on site before ordering, and confirm mounting method and finish against the drawing, since the grille is manufactured to the specified size rather than stocked in fixed dimensions.
FAQ
What is a round grille used for?
It's used where the air terminal connects directly to round or spiral duct, common in residential retrofits and smaller commercial installations.
Can round grilles be custom sized and finished?
Yes. They're manufactured in a range of sizes and finishes, including powder coating and anodizing, to match project requirements.
Do round grilles need a transition fitting?
No, that's the point of a round grille. It connects directly to round or spiral duct without a square-to-round transition.
What materials are round grilles made from?
Aluminum, steel, or custom material.
Running round or spiral duct on this project? Contact Goodwind for technical input, or see our perforated grille guide for visible architectural openings.