Collection: 4x6 Modern Vent Covers

Looking for a 4x6 vent cover? In our catalog, this exact size is listed as 6x4 — same duct opening, just the length written first instead of the width. This collection is built for wall and ceiling duct openings only. Choose the Linear Slot Diffuser for supply air or a clean decorative cover, or the Air Return Grille with a washable filter for return air. Whichever you pick, measure your duct opening before you order — not your old cover's faceplate. Either way, you get a clean, modern face that sits flush against your wall or ceiling — no dated stamped-steel look.

What "4x6" Means on This Vent Cover

"4x6" refers to your duct opening — the rough hole cut into your wall or ceiling — not the visible face of the cover. Our catalog lists this size as 6x4 because we write the longer dimension first, but it's the same physical opening as a 4x6. The faceplate itself is larger than the opening, sized to overlap the surrounding drywall or trim for a flush, gap-free finish.

Measure your duct opening — not the old cover's faceplate.

Choose Your 6x4 Vent Cover

Both products below fit the same 4x6 duct opening — the right one depends on which way air moves through it.

If your duct pushes conditioned air into the room, choose the Linear Slot Diffuser. If it pulls air back to your HVAC system, choose the Air Return Grille — its washable mesh pre-filter catches dust before air re-enters the system. Don't install the return grille on a supply duct: without a damper, it won't let you control airflow.

Both products are aluminum only at this size — there's no steel option in the 6x4 lineup, which keeps them light for ceiling installs and resistant to corrosion in bathrooms or kitchens.

Not a Floor Register — Wall & Ceiling Only

Both 6x4 covers in this collection are rated for wall and ceiling installation. Neither is designed for floor use, and there's no steel version at this size. If your duct opening is in the floor, look at our Floor Registers collection instead — Green Vent's aluminum floor lineup starts at 4x10.

Frequently Asked Questions

Are 4x6 and 6x4 vent covers the same size?

Yes. They describe the same duct opening — our catalog just lists the longer dimension first (6x4). Order by the opening size, not the naming order.

What's the actual faceplate size of a 4x6 vent cover?

Around 5¾" × 7¾". That's larger than the 4"×6" duct opening on purpose, so the faceplate overlaps the wall or ceiling surface for a clean, flush fit.

Does Green Vent make a 4x6 floor register?

No — the 4x6 (6x4) size in our catalog is wall and ceiling only. If you need a floor register, browse our 4x10 Floor Registers collection instead.

Can I install this on both a wall and a ceiling?

Yes. Both the Linear Slot Diffuser and the Air Return Grille in 6x4 are rated for wall or ceiling mounting, using standard screws with no extra anchoring needed.

Which one do I need — the diffuser or the return grille?

If air blows out of the opening, you need the Linear Slot Diffuser. If air is pulled in, you need the Air Return Grille with its washable filter.

Ready to upgrade your 4x6 duct opening? Upgrade Your Vent — confirm your duct size against the table above, then choose Linear Slot Diffuser or Air Return Grille below.

• Linear Slot Diffuser — full range
• Air Return Grille — full range
• Floor Registers (4x10)
• Air Vent Covers — all sizes