Collection: 6x6 Modern Vent Covers

6x6 Vent Cover: Shop Aluminum Registers, Grilles & Diffusers for Modern Homes

A 6x6 vent cover fits a duct opening that measures exactly 6 inches by 6 inches — not the outer faceplate, which extends beyond the opening to overlap rough duct edges. Green Vent offers this size across three precision-engineered aluminum product lines: the Linear Slot Diffuser, the Air Return Grille with washable mesh filter, and the Cube Core Eggcrate Return Air Grille. Every option is crafted from rust-proof aluminum alloy for a clean, long-lasting finish.

Before choosing, confirm what "6x6" actually measures — and why it matters for a precise, rattle-free fit.

What Is a 6x6 Vent Cover? (Sizing & Fit Explained)

A 6x6 vent cover fits a duct opening that measures exactly 6 inches by 6 inches. The "6x6" label refers to the duct hole cut into your wall, ceiling, or floor — not the outer grille frame visible from the room.

The outer faceplate extends beyond this opening, typically measuring approximately 7.75″–8.5″ square depending on the manufacturer, to overlap rough duct edges cleanly. Always measure the duct opening itself when ordering — never base your order on the old cover's dimensions, since faceplate sizes vary significantly between brands.

Dimension	Measurement	Notes
Duct Opening	6″ × 6″	The reference size you order by
Outer Face Plate	~7.75″–8.5″ sq.	Overlaps duct edges; varies by manufacturer

Now that you have your duct size confirmed, explore Green Vent's 6x6 aluminum vent covers — engineered to sit flush, resist corrosion, and elevate your interior.

Green Vent 6x6 Vent Covers: Find Your Perfect Match

Green Vent offers three 6x6 vent cover types in premium aluminum — each engineered for a specific HVAC function and placement.

6x6 Linear Slot Diffuser (Supply & Return Air)

The Green Vent 6x6 Linear Slot Diffuser is a modern aluminum vent cover that handles both supply and return air on walls, ceilings, and floors. The Linear Slot Diffuser features an integrated airflow controller for adjustable directional air delivery — a precision-engineered detail for energy-conscious homeowners. The Linear Slot Diffuser delivers the same clean linear slot aesthetic for bright, light-colored interiors.

Attribute	Detail
Material	Premium aluminum alloy — rust-proof
Colors	White, Black
Placement	Wall, Ceiling, Floor
Key Feature	Airflow controller; modern minimalist design

 

6x6 Air Return Grille with Washable Mesh Filter

The Green Vent 6x6 Air Return Grille captures return air while filtering out dust — keeping your HVAC system cleaner and running more quietly. The integrated washable mesh pre-filter is removable for easy maintenance, making this 6x6 air vent cover a long-lasting upgrade over standard open-face grilles. This model is designed for wall and ceiling installation only.

Attribute	Detail
Material	Aluminum
Colors	White
Placement	Wall, Ceiling
Key Feature	Washable mesh pre-filter; quiet HVAC operation

6x6 Eggcrate Return Air Grille (Cube Core)

The Green Vent 6x6 Cube Core Eggcrate Return Air Grille delivers a classic-modern decorative finish with maximum open-face airflow for return air applications. Its cube core grid pattern suits transitional, classic, and contemporary interiors equally well. An integrated filter is included, and this 6x6 vent grille is rated for wall and ceiling placement only.

Attribute	Detail
Material	Aluminum
Colors	White
Placement	Wall, Ceiling
Key Feature	Cube core eggcrate pattern; integrated filter; decorative

Not sure which type fits your system? Use the buying guide below to match function, placement, and finish in under two minutes.

How to Choose the Right 6x6 Vent Cover

Choose a 6x6 vent cover by answering three questions in sequence: What does the duct do? Where is it located? What finish matches your interior?

Step 1: Match Function — Supply Air vs. Return Air

Supply registers push conditioned air into a room; return grilles pull stale air back to your HVAC system — your duct's function determines which cover you need. Choose the Linear Slot Diffuser for supply air, featuring an adjustable airflow controller that gives you directional control. Choose the Air Return Grille or Eggcrate Return Grille for return air — identify the function by checking whether the duct blows outward or creates suction when the system runs.

Step 2: Match Placement — Wall, Ceiling, or Floor

Your vent cover's placement determines which Green Vent 6x6 product is compatible — not all types fit all locations. Use this quick reference:

• Wall or Ceiling: All three types — Linear Slot Diffuser, Air Return Grille, and Eggcrate Return Grille — are compatible.
• Floor: Only the Linear Slot Diffuser is rated for floor installation in Green Vent's 6x6 lineup.
• Floor durability: Aluminum handles foot traffic better than plastic, making it a more durable choice for high-traffic areas.

Step 3: Select Your Finish — White or Black

Your finish choice should complement your wall or ceiling color — Green Vent's 6x6 vent covers are available in White and Black depending on product type. White is available across all three product lines, making it the versatile default for light-colored walls, bright ceilings, and neutral interiors. Black is exclusive to the Linear Slot Diffuser, a refined choice for accent walls, dark interiors, or industrial-modern aesthetics.

Once your type is confirmed, make sure your 6x6 duct measurement is accurate — the next section shows exactly how.

How to Measure for a 6x6 Vent Cover (Get the Fit Right)

To confirm your vent is a 6×6, measure the duct opening itself — the actual hole in your wall, floor, or ceiling — not the old cover. Use a tape measure to record the opening's length and height in inches; a reading of 6″ × 6″ confirms you need a 6x6 vent cover. Old grille dimensions are unreliable for ordering because faceplate sizes vary between manufacturers.

With your size confirmed and your product selected, find quick answers to the most common 6x6 questions below.

Frequently Asked Questions: 6x6 Vent Covers

What does "6x6" mean on a vent cover?

"6x6" refers to the duct opening — the hole in your wall, ceiling, or floor — measured at 6 inches wide by 6 inches tall. The outer faceplate is larger to overlap the duct edges; always order using the duct opening size, not the grille frame dimensions.

What is the actual outer size of a 6x6 vent grille?

The outer face plate of a 6x6 vent grille is larger than the duct opening, typically measuring approximately 7.75″–8.5″ square depending on the manufacturer. This overlap — roughly 1″–1.5″ per side — covers rough duct edges and ensures a secure, rattle-free installation.

Can a Green Vent 6x6 cover be used on the floor?

Yes — the Green Vent 6x6 Linear Slot Diffuser is compatible with floor installation; however, the 6x6 Air Return Grille and Eggcrate Grille are designed for wall and ceiling use only. Aluminum's rust-proof durability makes the Linear Slot Diffuser a precision-engineered option for floor vents in living rooms, hallways, and high-traffic areas.

Do Green Vent 6x6 vent covers come with a damper?

The Green Vent 6x6 Linear Slot Diffuser includes an integrated airflow controller for adjustable directional supply; the return air grilles do not include a damper, as they are optimized for unrestricted return airflow. Select the right type for your 6x6 air vent cover using the three-step guide above — match your diffuser, grille, or register to your duct's exact function and location.