Collection: 6x8 Modern Vent Covers

A 6x8 vent cover fits an 8" × 6" duct opening — the actual hole in your wall, ceiling, or floor, not the size of your old cover's face. "6x8" and "8x6" describe the same opening; only the order of the numbers differs. Green Vent's 6x8 size is a white aluminum linear slot diffuser with a multi-directional adjustable damper, built for supply air and designed to replace a dated stamped-steel grille without any drywall or duct work. It replaces a dated stamped-steel grille with a modern, low-profile finish that blends into any wall or ceiling.

How to Measure a 6x8 Vent Cover

6x8 refers to your duct opening — 8" wide × 6" high — not the visible face of the cover. Remove your old vent cover and measure the hole itself before ordering.

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

Green Vent 6x8 Aluminum Linear Slot Diffuser

Built from solid alloy aluminum with a powder-coated white finish, this diffuser installs with the included screws in about 5 minutes — no structural changes required. The adjustable damper directs airflow left, right, both ways, or fully closed. It mounts on walls and ceilings, and drops into low-traffic floor openings when needed. Every unit is TÜV Rheinland tested for a lead-free, Prop 65-compliant, corrosion-resistant build.

Supply Air, Return Air, or Floor: Where Can You Install It?

This diffuser is built for supply air. It also works for many residential return openings, but for high-volume returns or filtration, choose a dedicated air return grille instead. For floor installs, it fits low-traffic areas only — a dedicated floor register holds up better under regular foot traffic.

6x8 Vent Cover FAQs

Is a 6x8 vent cover the same as an 8x6 vent cover?
Yes. Both describe the same 8" × 6" opening — what matters is your actual measurement, not which number comes first.

Does this collection include a 6x8 floor register?
No. This diffuser fits low-traffic floor openings, but it isn't a dedicated floor register built for regular foot traffic.

Does Green Vent make a 6x8 return air grille?
Not in this exact size. The closest options with a washable pre-filter are the 6x10 and 8x8 Air Return Grilles.

Does this diffuser come in Black?
No, this size is available in White only.

Can it be painted to match my wall or ceiling?
Yes. The powder-coated finish can be lightly sanded, primed, and painted.

Ready to close the gap between your old cover and your current décor? Upgrade Your Vent.