If you've ever shopped for a new vent cover, you've probably seen the words "register" and "grille" used almost interchangeably. They look similar, but they're not quite the same. Knowing the difference makes it much easier to choose the right replacement for each vent in your home.
What Is a Register?
A register is a vent cover with a built-in damper, a set of adjustable louvers you can open or close with a small lever or wheel. Registers are usually found on supply vents, where heated or cooled air blows into a room. Because you can adjust them, registers let you control how much air reaches each space.
Floor registers are especially common. For example, the Howeall 4x8 Heavy Duty Walkable Floor Register is sturdy enough to step on, and the 4x10 Floor Register 6-Pack is handy when you're updating several rooms at once.
What Is a Grille?
A grille is a simple vent cover with fixed slats and no damper. Grilles are most often used on return air vents, which pull air back to your HVAC system. Since return vents should stay open to keep air moving, they don't need adjustable louvers.
Some return grilles also hold an air filter, like the Handua Steel Return Air Filter Grille (24x12). A standard option is the 14x30 Return Air Grille.
Registers vs. Grilles at a Glance
- Damper: Registers have one. Grilles don't.
- Airflow control: Registers are adjustable. Grilles are always open.
- Typical use: Registers go on supply vents. Grilles go on return vents.
- Location: Registers are common on floors, walls, and ceilings. Grilles are usually larger and on walls or ceilings.
How to Choose the Right One
1. Identify the vent type
Turn on your system and hold your hand near the vent. If air blows out, it's a supply vent and usually needs a register. If air is pulled in, it's a return vent and usually needs a grille.
2. Measure the duct opening
Vent covers are sized by the duct opening, not the outer faceplate. Remove the old cover and measure the hole's width and length.
3. Pick the right material and finish
Steel is durable for floors, while plastic and aluminum work well on walls and ceilings. Decorative options like the Decor Grates Oriental Floor Register add a finishing touch.
Tips and Mistakes to Avoid
- Don't measure the old faceplate. Always measure the duct opening.
- Avoid closing too many registers at once, since it can strain your HVAC system.
- Keep furniture and rugs from blocking vents and return grilles.
- If a return grille holds a filter, check and replace it regularly.
Shop the Collection
Explore Ttavello's Registers & Grilles collection for floor registers, return air grilles, and vent covers in a range of sizes and finishes.
Related Guides
Coming soon on the Ttavello Blog: How to Choose the Right Air Vent Cover for Your Home, Return Air Grilles Explained: What Homeowners Should Know, and How to Improve Airflow in a Room Without Major Renovations.