4x12 Black Premium Aluminum Linear Slot Diffuser – Modern Design
Regular price $39.79
Shipping calculated at checkout.
- 2-slot design — a narrow, elongated size for hallways and long runs
- Matte black finish — blends into dark floors, trim, and modern interiors
- Adjustable Deflector Bar — direct airflow left, right, both sides, or fully closed
- Solid alloy aluminum — rust-resistant, zero plastic parts
- 5-minute drop-in install — no drywall or duct modification
A 4x12 linear slot diffuser for supply air in matte black — a narrow, elongated size for hallways, built to blend into dark trim.
Will a 4x12 Fit Your Space?
| Feature | Specification |
|---|---|
| Duct Opening Size | 4" × 12" |
| Neck Size | 3-3/4" × 11-3/4" |
| Overall Face Size | 5-3/4" × 13-3/4" |
| Weight | 1.43 lb |
| Material / Finish | Alloy aluminum, matte black powder-coated |
| Compatibility | Supply air, wall/ceiling/floor |
| Included | Diffuser, Deflector Bar, screws, manual guide card |
Installation
- Remove your old cover and confirm the duct opening measures 4" × 12".
- Mount with the included screws through the hidden side holes.
- Use the Deflector Bar to set airflow direction.
Frequently Asked Questions
What size do I order — 4x12 or face size?
Order by duct opening size (4" × 12"). The face size (5-3/4" × 13-3/4") overlaps the opening.
Is this for supply air or return air?
Supply air, with adjustable airflow. For return air, see the Return Air Vents collection.
Will the black finish fade or chip?
No — it's a matte black powder coat baked onto solid aluminum, not paint over plastic.
Is a white finish available?
Yes — see the 4x12 White Linear Slot Diffuser.
Can I install this on a floor?
Yes — mounts on walls, ceilings, or floors.
Explore Related Products
- White finish: 4x12 White Linear Slot Diffuser
- All sizes: Linear Slot Diffuser collection
