Collection: Premium Aluminum Linear Slot Diffuser

Green Vent's Full-Range Aluminum Linear Slot Diffuser Line

Green Vent's aluminum linear slot diffuser line runs 17 sizes across four slot configurations, in White or Black, all built for supply air. Every unit uses the same Smart Airflow Control mechanism, so the size and slot count you choose come down to your duct opening and the room it serves — not a trade-off in features. This is the full-depth line in Green Vent's linear slot diffuser family. If your duct cavity is unusually shallow, the Slim Design line below covers that case with the same airflow control in a thinner body.

What's Included in the Line

Sizes run from 2x12 up to 12x12, in solid alloy aluminum, priced from $24.63 to $63.83 — see the full breakdown in Green Vent's linear slot diffuser price guide. Every unit in this line is a supply air diffuser, not a return.

Smart Airflow Control, Same on This Line and Slim Design

Every diffuser in this line uses the same Smart Airflow Control mechanism: four airflow modes — 1-way, 2-way, high airflow, and high air speed — plus left-right direction control and a full open/close setting. It's the same mechanism you'll find on Green Vent's Slim Design line. What changes between the two isn't how the airflow adjusts — it's the body design. The Premium line uses a standard, full-depth body and covers the widest range of sizes and both finishes; Slim Design uses a thinner body for ducts with limited cavity depth, currently offered in four sizes. If your duct cavity isn't unusually shallow, this line gives you more sizes and more color options to match your space.

Where Can It Go?

Every size in this line mounts on a wall or ceiling. Floor installation is limited: only the 2x12, 2x14, 4x8, 4x10, 4x12, 6x10, 6x12, and 6x14 sizes are rated for floor use, and only in low-traffic areas — not hallways or entryways. The remaining sizes (4x6, 6x6, 6x8, 8x8, 8x10, 8x12, 8x14, 10x10, and 12x12) are wall and ceiling only. If you're shopping for a floor opening, check your size against the table above before ordering.

Choosing Slot Count and Color

Slot count determines how air spreads across the opening. 1-slot units (2x12, 2x14) suit narrow baseboard and toe-kick openings. 2-slot units (4x6 through 4x12) work well in bedrooms and hallways. 3-slot units (6x6 through 6x14, 8x14) suit mid-size rooms. 4-slot units (8x8, 8x10, 8x12) spread air across the widest face, for larger rooms. Browse by slot count: 2-slot, 3-slot, or 4-slot.

White is available across all 17 sizes. Black is available on 4x8, 4x10, 6x10, 4x12, 6x12, 2x12, and 2x14 — check the product page for current stock before ordering, since availability varies by size. Browse Black or White linear slot diffusers directly.

How to Measure

Measure your duct opening — not the old cover's faceplate — before ordering. A faceplate is typically larger than the opening itself, so measuring the old cover gives you the wrong number. Remove your existing cover, measure the raw opening's width and height, and match it to the sizes in the table above. For the full process once your diffuser arrives, see Green Vent's installation guide.

Frequently Asked Questions

What's the difference between this line and the Slim Design line?

Both use the same Smart Airflow Control mechanism — four airflow modes, left-right direction, and a full open/close setting. The difference is body design: this line uses a standard, full-depth body, while Slim Design uses a thinner body for shallow duct cavities.

Which sizes work as a floor linear slot diffuser?

The 2x12, 2x14, 4x8, 4x10, 4x12, 6x10, 6x12, and 6x14 sizes are rated for floor use, making them the floor linear slot diffuser options in this line — but only in low-traffic areas, not hallways or entryways. The remaining sizes (4x6, 6x6, 6x8, 8x8, 8x10, 8x12, 8x14, 10x10, and 12x12) are wall and ceiling only.

Does every size come in Black?

No. Black is currently available on 4x8, 4x10, 6x10, 4x12, 6x12, 2x12, and 2x14. Check the product page for current stock before ordering.

How do I adjust the airflow direction?

Use the Smart Airflow Control settings on the unit to switch between 1-way, 2-way, high airflow, and high air speed modes, or to close it fully. See Green Vent's adjustment guide for step-by-step instructions.

What slot count do I need for my room?

It depends on room size — 1-slot for narrow openings, up to 4-slot for larger rooms. See the slot count breakdown above for specific size guidance.

Whichever size fits your duct, every unit here ships ready for a straightforward wall or ceiling swap. Upgrade Your Vent.